Bodenlebende wirbellose Meerestiere (marines Makrozoobenthos)

German Red List

Rachor, E.; Bönsch, R.; Boos, K.; Gosselck, F.; Grotjahn, M.; Günther, C.-P.; Gusky, M.; Gutow, L.; Heiber, W.; Jantschik, P.; Krieg, H.-J.; Krone, R.; Nehmer, P.; Reichert, K.; Reiss, H.; Schröder, A.; Witt, J. & Zettler, M.L. (2013): Rote Liste und Artenliste der bodenlebenden wirbellosen Meerestiere. – In: Becker, N., Haupt, H., Hofbauer, N., Ludwig, G. & Nehring, S. (Bearb.): Rote Liste gefährdeter Tiere, Pflanzen und Pilze Deutschlands. Band 2: Meeresorganismen. – Bonn (Bundesamt für Naturschutz). – Naturschutz und Biologische Vielfalt 70 (2): 81–176.

Comment: The German national Red List threat categories do not correspond with the international IUCN categories.

Checklist

Scientific name German name Red List Category
Z
Zirfaea crispata (L., 1758) Rauhe Bohrmuschel Data Deficient
Zeppelina monostyla (Zeppelin, 1883) Data Deficient
W
Westwoodilla caecula (Bate, 1857) Data Deficient
Websterinereis glauca (Claparède, 1870) Not Threatened
Walkeria uva (L., 1758) Not Threatened
V
Vitreolina philippi (de Rayneval & Ponzi, 1854) Extremely Rare
Virgularia mirabilis (Müller, 1776) Extremely Rare
Victorella pavida Saville Kent, 1870 Data Deficient
Verruca stroemia (O.F. Müller, 1776) Not Threatened
Venus casina L., 1758 Not Threatened
Venerupis senegalensis (Gmelin, 1791) Teppichmuschel Threat of Unknown Extent
Velutina velutina (O.F. Müller, 1776) Samtschnecke Data Deficient
Vejdovskyella intermedia (Bretscher, 1896) Data Deficient
Vaunthompsonia cristata Bate, 1858 Not Threatened
U
Urticina felina (L., 1761) Dickhörnige Seerose Threat of Unknown Extent
Urticina eques (Gosse, 1858) Threatened
Urothoe poseidonis Reibisch, 1905 Not Threatened
Urothoe marina (Bate, 1857) Data Deficient
Urothoe elegans (Bate, 1857) Data Deficient
Urnatella gracilis Leidy, 1851 Data Deficient
Upogebia stellata (Montagu, 1808) Highly Threatened
Upogebia pusilla (Petagna, 1792) Threat of Unknown Extent
Upogebia deltaura (Leach, 1815) Threat of Unknown Extent
Unciola planipes Norman, 1867 Near Threatened
Unciola crenatipalma (Bate, 1862) Data Deficient
Uncinais uncinata (Ørsted, 1842) Data Deficient
T
Turritella turbona Monterosato, 1877  Extinct or Lost
Turritella communis Risso, 1826 Gemeine Turmschnecke Threat of Unknown Extent
Turbonilla lactea (L., 1758) Milchweiße Pyramidenschnecke Extremely Rare
Turbonilla acuta (Donovan, 1804) Spitze Pyramidenschnecke Not Threatened
Tubulipora liliacea (Pallas, 1766) Extremely Rare
Tubularia indivisa L., 1758 Data Deficient
Tubificoides pseudogaster (Dahl, 1960) Threat of Unknown Extent
Tubificoides heterochaetus (Michaelsen, 1926) Near Threatened
Tubificoides benedii (d'Udekem, 1855) Not Threatened
Tubificoides amplivasatus (Erséus, 1975) Data Deficient
Tubifex tubifex (O.F. Müller, 1774) Data Deficient
Tubifex nerthus Michaelsen, 1908 Near Threatened
Tryphosites longipes (Bate & Westwood, 1861) Not Threatened
Tryphosella sarsi Bonnier, 1893 Extremely Rare
Tryphosella horingi (Boeck, 1871) Extremely Rare
Trypetesa lampas (Hancock, 1849) Data Deficient
Trochochaeta multisetosa (Ørsted, 1844) Data Deficient
Trivia monacha (da Costa, 1778) Gefleckte Scheinkauri Threat of Unknown Extent
Tritonia plebeia Johnston, 1828 Europäische Nacktschnecke Not Threatened
Tritonia hombergii Cuvier, 1803 Große Tritonia Not Threatened
Triticella flava Dalyell, 1848 Not Threatened
Trichydra pudica Wright, 1858 Data Deficient
Trichobranchus roseus (Malm, 1874) Not Threatened
Trichobranchus glacialis Malmgren, 1866 Data Deficient
Travisia forbesii Johnston, 1840 Threat of Unknown Extent
Tornus subcarinatus (Montagu, 1803) Gekielte Tornus Data Deficient
Tomopteris septentrionalis Steenstrup, 1849 Not Evaluated
Tomopteris helgolandica (Greeff, 1879) Not Evaluated
Tmetonyx similis (Sars, 1891) Data Deficient
Tmetonyx cicada (Fabricius, 1780) Data Deficient
Timoclea ovata (Pennant, 1777) Ovale Teppichmuschel Threat of Unknown Extent
Thyonidium drummondii (Thompson, 1840) Spindel-Seegurke Data Deficient
Thyone fusus (O.F. Müller, 1776) Spitze Seegurke Data Deficient
Thyasira striata (Sturany, 1896) Extinct or Lost
Thyasira flexuosa (Montagu, 1803) Gewöhnliche Faltenmuschel Not Threatened
Thracia villosiuscula (MacGillivray, 1827) Granulierte Spatelmuschel Not Threatened
Thracia pubescens (Pulteney, 1799) Lange Spatelmuschel Extremely Rare
Thracia papyracea (Poli, 1791) Stumpfe Spatelmuschel Not Threatened
Thracia convexa (W. Wood, 1815) Aufgeblasene Spatelmuschel Extremely Rare
Thia scutellata (Fabricius, 1793) Data Deficient
Themisto gaudichaudii Guérin-Méneville, 1825 Data Deficient
Thelepus cincinnatus (Fabricius, 1780) Data Deficient
Thecocodium quadratum (Werner, 1965) Data Deficient
Tharyx multibranchiis (Grube, 1863) Extremely Rare
Thalassodrilus prostatus (Knöllner, 1935) Near Threatened
Testudinalia testudinalis (O.F. Müller, 1776) Echte Schildkrötenschnecke Not Threatened
Tergipes tergipes (Forskål, 1775) Tergipes Data Deficient
Teredo navalis L., 1758 Pfahlwurm Not Evaluated
Terebellides stroemi M. Sars, 1835 Not Threatened
Tenellia adspersa (Nordmann, 1845) Lagunen-Nacktschnecke Threat of Unknown Extent
Tellina tenuis da Costa, 1778 Platte Tellmuschel Near Threatened
Tellina pygmaea Lovén, 1846 Zwerg-Tellmuschel Data Deficient
Tellina fabula Gmelin, 1791 Gerippte Tellmuschel Not Threatened
Tellina donacina L., 1758 Gestreckte Tellmuschel Not Threatened
Tellimya ferruginosa (Montagu, 1808) Längliche Linsenmuschel Not Threatened
Tegella unicornis (Fleming, 1828) Not Threatened
Tectura virginea (O.F. Müller, 1776) Weiße Schildkrötenschnecke Near Threatened
Tapes rhomboides (Pennant, 1777) Not Threatened
Tanganella muelleri Kraepelin, 1887 Data Deficient
Talochlamys pusio (L., 1758) Extinct or Lost
Talitrus saltator (Montagu, 1808) Strandfloh, Sandhüpfer Highly Threatened
S
Synoicum pulmonaria (Ellis & Solander, 1786) Extinct or Lost
Synchelidium tenuimanum Norman, 1895 Data Deficient
Synchelidium maculatum Stebbing, 1906 Data Deficient
Synchelidium haplocheles (Grube, 1864) Near Threatened
Syllis prolifera Krohn, 1852 Extinct or Lost
Syllis hyalina Grube, 1863  Extremely Rare
Syllis gracilis Grube, 1840 Extremely Rare
Syllis armillaris (O.F. Müller, 1776) Data Deficient
Syllidia armata Quatrefages, 1866 Data Deficient
Syllides longocirratus (Ørsted, 1845) Data Deficient
Syllides benedicti Banse, 1971 Data Deficient
Syllides articulocirratus Gillandt, 1979 Extremely Rare
Sycon ciliatum (Fabricius, 1780) Data Deficient
Suberites ficus (Johnston, 1842) Korkschwamm Extremely Rare
Stylodrilus heringianus Claparède, 1862 Data Deficient
Stylaria lacustris (L., 1767) Data Deficient
Styela coriacea (Alder & Hancock, 1848) Threat of Unknown Extent
Styela clava Herdman, 1881 Not Evaluated
Styela canopus (Savigny, 1816) Extremely Rare
Strongylocentrotus droebachiensis (O.F. Müller, 1776) Rundstacheliger Seeigel Extremely Rare
Striarca lactea (L., 1758) Not Threatened
Streptosyllis websteri Southern, 1914 Data Deficient
Streptosyllis arenae Webster & Benedict, 1884 Data Deficient
Streblospio shrubsolii (Buchanan, 1890) Near Threatened
Sthenelais limicola (Ehlers, 1864) Not Threatened
Sthenelais boa (Johnston, 1833) Threat of Unknown Extent
Stenula rubrovittata Sars, 1883 Data Deficient
Stenothoe monoculoides (Montagu, 1815) Extremely Rare
Stenothoe marina (Bate, 1856) Not Threatened
Stauridiosarsia spongicola (Anger, 1972) Data Deficient
Spongilla lacustris (L., 1759) (Süßwasserschwamm) Not Evaluated
Spondylus sinensis Schreibers, 1793 Extinct or Lost
Spisula subtruncata (da Costa, 1778) Gedrungene Trogmuschel Threat of Unknown Extent
Spisula solida (L., 1758) Dickschalige Trogmuschel Threat of Unknown Extent
Spisula elliptica (Brown, 1827) Elliptische Trogmuschel Highly Threatened
Spirorbis tridentatus Levinsen, 1883 Threat of Unknown Extent
Spirorbis spirorbis (L., 1758) Posthörnchenwurm Threat of Unknown Extent
Spirontocaris spinus (Sowerby, 1805) Extinct or Lost
Spirobranchus triqueter (L., 1758) Dreikantwurm Not Threatened
Spirobranchus lamarcki (Quatrefages, 1866) Extremely Rare
Spiophanes kroyeri Grube, 1860 Not Threatened
Spiophanes bombyx (Claparède, 1870) Not Threatened
Spio martinensis Mesnil, 1896 Not Threatened
Spio goniocephala Thulin, 1957 Not Threatened
Spio filicornis (O.F. Müller, 1776) Not Threatened
Spio decoratus Bobretzky, 1870 Data Deficient
Spio armata (Thulin, 1957) Data Deficient
Sphaerosyllis hystrix Claparède, 1863 Extremely Rare
Sphaerodorum gracilis (Rathke, 1843) Not Threatened
Sphaerodoropsis minuta (Webster & Benedict, 1887) Not Threatened
Sphaerodoropsis baltica (Reimers, 1933) Data Deficient
Spatangus purpureus O.F. Müller, 1776 Violetter Herzseeigel Threatened with Extinction
Solen marginatus Pulteney, 1799 Extinct or Lost
Smittina landsborovii (Johnston, 1847) Extremely Rare
Skeneopsis planorbis (O. Fabricius, 1780) Gemeine Zwergtellerschnecke Highly Threatened
Siphonoecetes striatus Myers & McGrath, 1979 Data Deficient
Siphonoecetes kroyeranus Bate, 1856 Not Threatened
Sigalion squamosus Delle Chiaje, 1830 Data Deficient
Sigalion mathildae Audouin & Milne-Edwards, 1830 Threatened
Sertularia tenera G.O. Sars, 1874 Data Deficient
Sertularia cupressina L., 1758 Zypressenmoos, Seemoos Threat of Unknown Extent
Sertularella rugosa (L., 1758) Extremely Rare
Sertularella polyzonias (L., 1758) Extremely Rare
Sertularella mediterranea Hartlaub, 1901 Data Deficient
Sepiola atlantica d'Orbigny, 1839 Atlantische Sepiole Data Deficient
Sepia officinalis L., 1758 Gemeiner Tintenfisch Not Evaluated
Semibalanus balanoides (L., 1758) Gemeine Seepocke Not Threatened
Securiflustra securifrons (Pallas, 1766) Extremely Rare
Scrupocellaria scruposa (L., 1758) Extremely Rare
Scrupocellaria scrupea Busk, 1852 Extinct or Lost
Scrupocellaria reptans (L., 1758) Extremely Rare
Scruparia chelata (L., 1758) Extremely Rare
Scrobicularia plana (da Costa, 1778) Pfeffermuschel Threatened with Extinction
Scopelocheirus hopei (Costa, 1851) Not Threatened
Scoloplos armiger (O.F. Müller, 1776) Not Threatened
Scolelepis tridentata (Southern, 1914) Data Deficient
Scolelepis squamata (O.F. Müller, 1806) Not Threatened
Scolelepis korsuni Sikorski, 1994 Data Deficient
Scolelepis foliosa (Audouin & Milne-Edwards, 1833) Not Threatened
Scolelepis bonnieri (Mesnil, 1896) Not Threatened
Scolanthus callimorphus Gosse, 1853 Data Deficient
Schizoporella unicornis (Johnston in Wood, 1844) Extremely Rare
Schizoporella errata (Waters, 1878) Extremely Rare
Schizomavella linearis (Hassall, 1841) Data Deficient
Scalibregma inflatum Rathke, 1843 Threat of Unknown Extent
Saxicavella jeffreysi Winckworth, 1930 Fragiler Felsenbohrer Not Threatened
Sarsia tubulosa (M. Sars, 1835) Near Threatened
Sarsia lovenii (M. Sars, 1846) Data Deficient
Sagartiogeton viduatus (O.F. Müller, 1776) Data Deficient
Sagartiogeton undatus (O.F. Müller, 1778) Schlammrose, Schlangenhaar-Seerose Threatened
Sagartiogeton laceratus (Dalyell, 1848) Extremely Rare
Sagartia troglodytes (Price in Johnston, 1847) Data Deficient
Sagartia elegans (Dalyell, 1848) Data Deficient
Saduria entomon (L., 1758) Riesenassel Threat of Unknown Extent
Sabellaria spinulosa Leuckart, 1849 Sandkoralle, Pümpwurm Highly Threatened
Sabellaria alveolata (L., 1767) Extremely Rare
Sabella spallanzani (Gmelin, 1791) Schlickröhrenwurm Extinct or Lost
R
Roxania utriculus (Brocchi, 1814) Not Threatened
Rissoa violacea Desmarest, 1814 Violette Rissoe Data Deficient
Rissoa variabilis (von Mühlfeldt, 1824) Extinct or Lost
Rissoa parva (da Costa, 1778) Komma-Zwergschnecke Near Threatened
Rissoa membranacea (J. Adams, 1800) Pergament-Rissoe Near Threatened
Rhodine loveni Malmgren, 1865 Data Deficient
Rhodine gracilior Tauber, 1879 Data Deficient
Rhizorhagium roseum M. Sars, 1874 Data Deficient
Rhizodrilus pilosus (Goodrich, 1892) Data Deficient
Rhizocaulus verticillatus (L., 1758) Threat of Unknown Extent
Rhithropanopeus harrisii (Gould, 1841) Not Evaluated
Rhabdomolgus ruber Keferstein, 1862 Data Deficient
Retusa truncatula (Bruguière, 1792) Abgestutzte Tönnchenschnecke Not Threatened
Retusa obtusa (Montagu, 1803) Zugespitzte Tönnchenschnecke Not Threatened
Rathkea octopunctata (M. Sars, 1835) Data Deficient
Raphitoma linearis (Montagu, 1803) Zierliche Nadelschnecke Extremely Rare
Raphitoma leufroyi (Michaud, 1827) Data Deficient
Raphitoma aequalis Jeffreys, 1867 Extinct or Lost
P
Pygospio elegans Claparède, 1863 Not Threatened
Pycnogonum litorale (Strom, 1762) Knotige Asselspinne Data Deficient
Pusillina inconspicua (Alder, 1844) Gefleckte Zwergschnecke Not Threatened
Puncturella noachina (L., 1771) Nordische Lochschnecke Not Threatened
Pterolysippe vanelli (Fauvel, 1936) sensu Eliason, 1955 Data Deficient
Pseudoprotella phasma (Montagu, 1804) Data Deficient
Pseudopotamilla reniformis (O.F. Müller, 1771) Data Deficient
Pseudopolydora pulchra (Carazzi, 1895) Not Threatened
Pseudopolydora antennata (Claparède, 1869) Data Deficient
Pseudomystides limbata (Saint Joseph, 1888) Extremely Rare
Pseudocuma simile G.O. Sars, 1900 Not Threatened
Pseudocuma longicorne (Bate, 1858) Data Deficient
Pseudione callianassae Kossmann, 1881 Data Deficient
Pseudione borealis Caspers, 1939 Data Deficient
Psammoryctides barbatus (Grube, 1891) Data Deficient
Psammoryctides albicola (Michaelsen, 1901) Data Deficient
Psammodrilus balanoglossoides Swedmark, 1952 Extremely Rare
Psammechinus miliaris (P.L.S. Müller, 1771) Strandseeigel Not Threatened
Protosuberites epiphytum (Lamarck, 1815) Extremely Rare
Protomedeia fasciata Krøyer, 1842 Extremely Rare
Protohydra leuckarti Greeff, 1870 Data Deficient
Protodrilus purpureus (Schneider, 1868) Extinct or Lost
Protodriloides chaetifer (Remane, 1926) Data Deficient
Protodorvillea kefersteini (McIntosh, 1869) Not Threatened
Prosphaerosyllis tetralix (Eliason, 1920) Data Deficient
Propebela turricula (Montagu, 1803) Treppengiebelchen Not Threatened
Propebela assimilis (G.O. Sars, 1878) Extinct or Lost
Propappus volki Michaelsen, 1916 Data Deficient
Proclymene muelleri (Sars, 1856) Not Evaluated
Processa parva Holthuis, 1951 Data Deficient
Processa nouveli holthuisi Al-Adhub & Williamson, 1975 Not Threatened
Processa modica Williamson, 1979 Data Deficient
Processa canaliculata Leach, 1815 Near Threatened
Proceraea prismatica (O.F. Müller, 1776) Not Threatened
Proceraea cornuta (Agassiz, 1862) Not Threatened
Prionospio steenstrupi Malmgren, 1867 Not Threatened
Prionospio multibranchiata E. Berkeley, 1927 Data Deficient
Prionospio malmgreni Claparède, 1869 Data Deficient
Prionospio cirrifera Wirén, 1883 Extremely Rare
Prionospio banyulensis Laubier, 1966 Data Deficient
Praxillura longissima Arwidsson, 1906 Data Deficient
Praxillella praetermissa (Malmgren, 1865) Data Deficient
Potamothrix vejdovskyi (Hrabe, 1941) Threat of Unknown Extent
Potamothrix moldaviensis Vejdovsky & Mrazek, 1902 Not Threatened
Potamothrix heuscheri (Bretscher, 1900) Threat of Unknown Extent
Potamothrix hammoniensis (Michaelsen, 1901) Data Deficient
Potamothrix bavaricus (Oschman, 1913) Threat of Unknown Extent
Portumnus latipes (Pennant, 1777) Schwimmkrabbe Not Threatened
Porcellana platycheles (Pennant, 1777) Data Deficient
Pontoporeia femorata Krøyer, 1842 Near Threatened
Pontophilus spinosus (Leach, 1815) Extremely Rare
Pontogammarus robustoides (G.O. Sars, 1894) Not Evaluated
Pontocrates arenarius (Bate, 1858) Not Threatened
Pontocrates altamarinus (Bate & Westwood, 1862) Not Threatened
Pontaster tenuispinus (Düben & Koren, 1846) Data Deficient
Polyphysia crassa (Ørsted, 1843) Threatened
Polymastia penicillus (Montagu, 1818) Extremely Rare
Polymastia boletiformis (Lamarck, 1815) Extremely Rare
Polygordius lacteus Schneider, 1868 Near Threatened
Polygordius appendiculatus Fraipont, 1887 Near Threatened
Polydora cornuta Bosc, 1802 Not Threatened
Polydora ciliata (Johnston, 1838) Not Threatened
Polyclinum aurantium Milne-Edwards 1841 Extremely Rare
Polycirrus medusa Grube, 1850 Data Deficient
Polycirrus aurantiacus Grube, 1860 Extremely Rare
Polycera quadrilineata (O.F. Müller, 1776) Gestreifte Hörnchenschnecke Not Threatened
Poecilochaetus serpens Allen, 1904 Not Threatened
Pododesmus patelliformis (L., 1761) Große Sattelmuschel Not Threatened
Podarkeopsis helgolandica (Hilbig & Dittmer, 1979) Not Threatened
Plumularia setacea (L., 1758) Data Deficient
Plumatella repens (L., 1758) Data Deficient
Plumatella fungosa (Pallas, 1768) Data Deficient
Plumatella fruticosa Allman, 1844 Data Deficient
Plumatella emarginata Allman, 1844 Data Deficient
Pleurogonium rubicundum (G.O. Sars, 1864) Extremely Rare
Pleurocrypta longibranchiata (Bate & Westwood, 1868) Data Deficient
Pleraplysilla minchini Topsent, 1905 Extremely Rare
Platynereis dumerilii (Audouin & Milne-Edwards, 1833) Threat of Unknown Extent
Platorchestia platensis (Krøyer, 1845) Data Deficient
Plagioecia sarniensis (Norman, 1864) Data Deficient
Plagioecia patina (Lamarck, 1816) Threat of Unknown Extent
Pisione remota (Southern, 1914) Not Threatened
Pisidia longicornis (L., 1767) Not Threatened
Pirimela denticulata (Montagu, 1808) Extinct or Lost
Pinnotheres pisum (L., 1767) Muschelwächter Data Deficient
Pilumnus hirtellus (L., 1761) Threatened
Phyllodoce rosea (McIntosh, 1877) Not Threatened
Phyllodoce mucosa Ørsted, 1843 Not Threatened
Phyllodoce maculata (L., 1767) Not Threatened
Phyllodoce longipes Kinberg, 1866 Data Deficient
Phyllodoce lineata (Claparède, 1870) Data Deficient
Phyllodoce laminosa Savigny in Lamarck, 1818 Data Deficient
Phyllodoce groenlandica Ørsted, 1842 Not Threatened
Phyllodoce citrina Malmgren, 1865 Threat of Unknown Extent
Phtisica marina Slabber, 1769 Not Threatened
Phoxocephalus holbolli (Krøyer, 1842) Data Deficient
Phoxichilidium femoratum (Rathke, 1799) Extremely Rare
Photis reinhardi Krøyer,1842 Not Threatened
Photis longicaudata (Bate & Westwood, 1862) Near Threatened
Pholoe inornata Johnston, 1839 Extremely Rare
Pholoe baltica Ørstedt, 1843 Not Threatened
Pholoe assimilis Ørstedt, 1845 Data Deficient
Pholas dactylus L., 1758 Dattelmuschel Extremely Rare
Philocheras trispinosus (Hailstone in Hailstone & Westwood, 1835) Data Deficient
Philocheras bispinosus (Hailstone, 1835) Data Deficient
Philine scabra (O.F. Müller, 1776) Raue Seemandel Extremely Rare
Philine punctata (J. Adams, 1800) Kleine Seemandel Not Threatened
Philine catena (Montagu, 1803) Data Deficient
Philine aperta (L., 1767) Offene Seemandel Not Threatened
Phialella quadrata (Forbes, 1848) Data Deficient
Pherusa plumosa (O.F. Müller, 1776) Data Deficient
Pherusa flabellata (M. Sars in G.O. Sars, 1872) Not Threatened
Phaxas pellucidus (Pennant, 1777) Durchscheinende Scheidenmuschel Not Threatened
Petricolaria pholadiformis (Lamarck, 1818) Amerikanische Bohrmuschel Not Evaluated
Pestarella tyrrhena (Petagna, 1792) Data Deficient
Perioculodes longimanus (Bate & Westwood, 1868) Not Threatened
Peringia ulvae (Pennant, 1777) Glatte Wattschnecke Not Threatened
Peloscolex ferox (Eisen, 1879) Data Deficient
Pelagobia longicirrata Gravier, 1911 Data Deficient
Pectinaria belgica (Pallas, 1766) Not Threatened
Pecten maximus L., 1758 Große Pilgermuschel Data Deficient
Peachia cylindrica (Reid, 1848) Data Deficient
Patella vulgata L., 1758 Gemeine Napfschnecke Data Deficient
Patella pellucida L., 1758 Durchscheinende Napfschnecke Not Threatened
Parvipalpus capillaceus (Chevreux, 1888)  Data Deficient
Parvicardium scabrum (Philippi, 1844) Weißliche Herzmuschel Data Deficient
Parvicardium pinnulatum (Conrad, 1831) Ovale Herzmuschel Data Deficient
Parvicardium hauniense (Høpner Petersen & Russell, 1971) Kopenhagener Herzmuschel Extremely Rare
Parvicardium exiguum (Gmelin, 1791) Dreieckige Herzmuschel Threatened with Extinction
Pariambus typicus (Krøyer, 1844) Not Threatened
Parapleustes bicuspis (Krøyer, 1838) Extremely Rare
Parapleustes assimilis (Sars, 1882) Not Threatened
Paraonis fulgens (Levinsen, 1884) Not Threatened
Paranais litoralis (O.F. Müller, 1784) Threat of Unknown Extent
Paranais frici Hrabe, 1941 Threat of Unknown Extent
Paramphinome jeffreysii (McIntosh, 1868) Not Threatened
Paramphilochoides odontonyx (Boeck, 1871) Not Threatened
Parajassa pelagica (Leach, 1814) Extremely Rare
Paraiptasia radiata (Stimpson, 1856) Data Deficient
Paradoneis lyra (Southern, 1914) Not Threatened
Paradoneis eliasoni Mackie, 1991 Not Threatened
Paracentrotus lividus (Lamarck, 1816) Stein-Seeigel Threat of Unknown Extent
Pandalus montagui Leach, 1814 Not Threatened
Pandalus borealis Krøyer, 1838 Tiefseegarnele Not Threatened
Pandalina brevirostris (Rathke, 1843) Threat of Unknown Extent
Paludicella articulata (Ehrenberg, 1831) Data Deficient
Palliolum tigerinum (O.F. Müller, 1776) Extinct or Lost
Palio nothus (Johnston, 1838) Extremely Rare
Palio dubia (M. Sars, 1829) Gefleckte Hörnchenschnecke Data Deficient
Palaemonetes varians (Leach, 1814) Near Threatened
Palaemon macrodactylus Rathbun, 1902 Not Evaluated
Palaemon longirostris H. Milne-Edwards, 1837 Data Deficient
Palaemon elegans Rathke, 1837 Not Threatened
Palaemon adspersus Rathke, 1837 Near Threatened
Pagurus pubescens Krøyer, 1838 Highly Threatened
Pagurus bernhardus (L., 1758) Einsiedlerkrebs Not Threatened
Pachycordyle navis (Millard, 1959) Data Deficient
O
Owenia fusiformis Delle Chiaje, 1841 Not Threatened
Othomaera othonis (Milne-Edwards, 1830) Data Deficient
Ostrea edulis L., 1758 Europäische, Gemeine Auster Threatened with Extinction
Oscarella lobularis (Schmidt, 1862) Extremely Rare
Orchomenella pinguis (Boeck, 1961) Extinct or Lost
Orchomenella nana (Krøyer, 1846) Not Threatened
Orchomenella minuta (Krøyer, 1846) Data Deficient
Orchomene humilis (Costa, 1853) Data Deficient
Orchestia gammarellus (Pallas, 1766) Küstenhüpfer Near Threatened
Orchestia cavimana Heller, 1865 Data Deficient
Orbinia sertulata (Savigny, 1820) Data Deficient
Orbinia latreilli (Audouin & Milne-Edwards, 1833) Extremely Rare
Orbinia cuvierii (Audouin & Milne-Edwards, 1833) Extinct or Lost
Orbinia armandi (McIntosh, 1910) Data Deficient
Ophryotrocha puerilis siberti (McIntosh, 1885) Data Deficient
Ophryotrocha gracilis Huth, 1933 Data Deficient
Ophiura sarsii Lütken, 1855 Data Deficient
Ophiura ophiura (L., 1758) Schuppiger, Großer Schlangenstern Not Threatened
Ophiura albida Forbes, 1839 Heller, Kleiner Schlangenstern Not Threatened
Ophiothrix fragilis (Abildgaard in O.F. Müller, 1789) Zerbrechlicher Schlangenstern Near Threatened
Ophiopholis aculeata (L., 1767) Höhlen-Schlangenstern Data Deficient
Ophiodromus flexuosus (Delle Chiaje, 1827) Not Threatened
Ophiocten affinis (Lütken, 1858) Data Deficient
Ophidonais serpentina (O.F. Müller, 1773) Data Deficient
Ophelina modesta Støp-Bowitz, 1958 Data Deficient
Ophelina minima Hartmann-Schröder, 1974 Data Deficient
Ophelina acuminata Ørsted, 1843 Not Threatened
Ophelia rathkei McIntosh, 1908 Near Threatened
Ophelia limacina (Rathke, 1843) Not Threatened
Opercularella pumila Clark, 1875 Data Deficient
Opercularella lacerata (Johnston, 1847) Data Deficient
Onoba semicostata (Montagu, 1803) Halbgerippte Kleinschnecke Not Threatened
Onoba aculeus (Gould, 1841) Spitze Kleinschnecke Extremely Rare
Ondina divisa (J. Adams, 1797) Geteilte Pyramidenschnecke, Undine Not Threatened
Oncousoecia dilatans (Johnston, 1847) Data Deficient
Onchidoris pusilla (Alder & Hancock, 1845) Not Threatened
Onchidoris muricata (O.F. Müller, 1776) Blassgraue Sternschnecke Not Threatened
Onchidoris fusca (O.F. Müller, 1776) Extinct or Lost
Onchidoris depressa (Alder & Hancock, 1842) Not Threatened
Onchidoris bilamellata (Linnaeus, 1767) Braungefleckte Sternschnecke Not Threatened
Onchidoris aspera (Alder & Hancock, 1842) Raue Sternschnecke Extinct or Lost
Omalogyra atomus (Philippi, 1841) Flache Zwergtellerschnecke Data Deficient
Odostomia unidentata (Montagu, 1803) Einzahn-Pyramidenschnecke Extremely Rare
Odostomia scalaris MacGillivray, 1843 Gestufte Pyramidenschnecke Not Threatened
Odostomia eulimoides Hanley, 1844 Blasse Pyramidenschnecke Extremely Rare
Octopus vulgaris Cuvier, 1797 Gemeiner Krake Extremely Rare
Obelia longissima (Pallas, 1766) Data Deficient
Obelia geniculata (L., 1758) Data Deficient
Obelia dichotoma (L., 1758)  Data Deficient
Obelia bidentata Clarke, 1875 Data Deficient
N
Nymphon grossipes (Fabricius, 1780) Data Deficient
Nymphon gracile Leach, 1814 Not Threatened
Nymphon brevirostre Hodge, 1863 Zierliche Asselspinne Not Threatened
Nuculana pernula O.F. Müller, 1779 Große Schnabelmuschel Not Threatened
Nuculana minuta (O.F. Müller, 1776) Kleine Schnabelmuschel Not Threatened
Nucula nucleus (L., 1758) Große Nussmusschel Threatened with Extinction
Nucula nitidosa Winckworth, 1930 Glänzende Nussmuschel Not Threatened
Nucella lapillus (L., 1758) Nördliche Purpurschnecke Highly Threatened
Nototropis falcatus (Metzger, 1871) Not Threatened
Notophyllum foliosum (Sars, 1835) Data Deficient
Notomastus latericeus M. Sars, 1851 Not Threatened
Nothria conchylega (M. Sars, 1835) Data Deficient
Nicomache personata Johnson, 1901 Data Deficient
Nicomache minor Arwidsson, 1906 Data Deficient
Nicomache lumbricalis (Fabricius, 1780) Not Threatened
Nicolea zostericola Ørsted, 1844 Not Threatened
Nicolea venustula (Montagu, 1818) Threat of Unknown Extent
Nerilla antennata O. Schmidt, 1848 Threat of Unknown Extent
Nereis zonata Malmgren, 1867 Data Deficient
Nereis pelagica L., 1758 Not Threatened
Nereimyra punctata (O.F. Müller, 1788) Threat of Unknown Extent
Neptunea antiqua (L., 1758) Spindelschnecke Threat of Unknown Extent
Nephtys pente Rainer, 1984 Data Deficient
Nephtys paradoxa Malm, 1874 Extremely Rare
Nephtys longosetosa Ørsted, 1842 Not Threatened
Nephtys kersivalensis McIntosh, 1908 Data Deficient
Nephtys incisa Malmgren, 1865 Not Threatened
Nephtys hombergii Savigny in Lamarck, 1818 Not Threatened
Nephtys cirrosa (Ehlers, 1868) Not Threatened
Nephtys ciliata (O.F. Müller, 1776) Not Threatened
Nephtys caeca (Fabricius, 1780) Not Threatened
Nephtys assimilis Ørsted, 1843 Not Threatened
Nephrops norvegicus (L., 1758) Kaisergranat, Norwegischer Hummer Threat of Unknown Extent
Neoleanira tetragona (Ørsted, 1845) Extremely Rare
Neoamphitrite groenlandica (Malmgren, 1866) Extremely Rare
Neoamphitrite figulus (Dalyell, 1853) Not Threatened
Nemopsis bachei (L. Agassiz, 1849) Not Evaluated
Nemertesia ramosa (Lamarck, 1816) Data Deficient
Necora puber (L., 1767) Behaarte Schwimmkrabbe Not Threatened
Neanthes fucata (Savigny in Lamarck, 1818) Not Threatened
Natatolana borealis (Lilljeborg, 1851) Data Deficient
Nassarius reticulatus (L., 1758) Gemeine Netzreusenschnecke Threat of Unknown Extent
Nassarius incrassatus (Ström, 1768) Dicklippige Netzreusenschnecke Threat of Unknown Extent
Nannonyx goesi (Boeck, 1871) Data Deficient
Nais variabilis Piguet, 1906 Data Deficient
Nais elinguis O.F. Müller, 1773 Not Threatened
Nais barbata O.F. Müller, 1773 Data Deficient
M
Myxilla incrustans (Johnston, 1842) Extremely Rare
Mytilus trossulus Gould, 1850 Pazifische Miesmuschel Data Deficient
Mytilus edulis L., 1758 Miesmuschel Not Threatened
Mytilopsis leucophaeata (Conrad, 1831) Brackwasser-Dreiecksmuschel Not Evaluated
Mystides southerni (Banse, 1954) Data Deficient
Mysta picta (Quatrefages, 1865) Extremely Rare
Mysia undata (Pennant, 1777) Mysia Not Threatened
Myriochele heeri Malmgren, 1867 Extremely Rare
Myrianida quindecimdentata (Langerhans, 1884) Data Deficient
Myrianida prolifera (O.F. Müller, 1788) Not Threatened
Myrianida inermis (Saint Joseph, 1887)  Extremely Rare
Myrianida edwardsi (Saint Joseph, 1887) Data Deficient
Myrianida brachycephala (Marenzeller, 1874) Extremely Rare
Myosotella myosotis (Draparnaud, 1801) Mäuseöhrchen Threatened with Extinction
Mycale macilenta (Bowerbank, 1866) Extremely Rare
Mya truncata L., 1758 Abgestutzte Klaffmuschel Highly Threatened
Mya arenaria L., 1758 Sandklaffmuschel Not Threatened
Musculus niger J.E. Gray, 1824 Schwarze Bohnenmuschel Threat of Unknown Extent
Musculus discors (L., 1767) Grüne Bohnenmuschel Threat of Unknown Extent
Montacuta substriata (Montagu, 1808) Konkave Linsenmuschel Not Threatened
Monopylephorus rubroniveus Levinsen, 1884 Threat of Unknown Extent
Monopylephorus irroratus (Verrill, 1873) Near Threatened
Monopseudocuma gilsoni (Gilson, 1906) Data Deficient
Monoporeia affinis Lindström, 1855 Threatened
Monophorus perversus (L., 1758) Verkehrtschnecke Threat of Unknown Extent
Monoculodes carinatus (Bate, 1857) Data Deficient
Monocorophium sextonae (Crawford, 1937) Not Evaluated
Monocorophium insidiosum (Crawford, 1937) Not Threatened
Monocorophium ascherusicum (Costa, 1857) Data Deficient
Molgula tubifera (Oersted, 1844) Extremely Rare
Molgula provisionalis van Name, 1945 Data Deficient
Molgula oculata Forbes, 1848 Data Deficient
Molgula manhattensis (De Kay, 1843) Data Deficient
Molgula complanata Alder & Hancock, 1870 Extremely Rare
Molgula citrina Alder & Hancock, 1848 Not Threatened
Modiolus modiolus (L., 1758) Pferdemuschel, Große Miesmuschel Highly Threatened
Modiolula phaseolina (Philippi, 1844) Extinct or Lost
Modiolarca subpicta (Cantraine, 1835) Marmorierte Bohnenmuschel Threat of Unknown Extent
Mimachlamys varia (L., 1758) Bunte Kammmuschel Not Threatened
Microspio mecznikowianus (Claparède, 1869) Data Deficient
Microprotopus maculatus Norman, 1867 Not Threatened
Microprotopus longimanus Chevreux, 1887 Not Threatened
Microporella ciliata (Pallas, 1766) Extremely Rare
Microphthalmus similis Bobretzky, 1870 Data Deficient
Microphthalmus sczelkowii Metschnikow, 1865 Extremely Rare
Microphthalmus listensis Westheide, 1967 Data Deficient
Microphthalmus fragilis Bobretzky, 1870 Data Deficient
Microphthalmus aberrans (Webster & Benedict, 1887) Not Threatened
Microjassa cumbrensis (Stebbing & Robertson, 1891) Extremely Rare
Microhedyle glandulifera (Kowalewsky, 1901) Milchigweiße Sandlücken-Nacktschnecke Extinct or Lost
Microdeutopus gryllotalpa Costa, 1853 Not Threatened
Microdeutopus anomalus (Rathke, 1843) Extremely Rare
Metridium senile (L., 1761) Seenelke Threat of Unknown Extent
Metridium dianthus (Ellis, 1768) Data Deficient
Metopa pusilla Sars, 1892 Not Threatened
Metopa borealis Sars, 1882 Near Threatened
Metopa alderi (Bate, 1857) Near Threatened
Membraniporella nitida (Johnston, 1838) Data Deficient
Membranipora membranacea (L., 1767) Seerinde Near Threatened
Melphidippella macra (Norman, 1869) Data Deficient
Melita palmata (Montagu, 1804) Near Threatened
Melita hergensis Reid, 1939 Data Deficient
Melita dentata (Krøyer, 1842) Data Deficient
Melinna cristata (M. Sars, 1851) Data Deficient
Melicertum octocostatum (Sars, 1835) Data Deficient
Melarhaphe neritoides (L., 1758) Zwerg-Strandschnecke Extinct or Lost
Melanella conoidea (Kurtz & Stimpson, 1851) Data Deficient
Melanella alba (da Costa, 1778) Weiße Pfriemschnecke Data Deficient
Megamphopus cornutus Norman, 1869 Not Threatened
Megaluropus agilis Hoeck, 1889 Near Threatened
Mediomastus fragilis Rasmussen, 1973 Data Deficient
Medicorophium affine (Bruzelius, 1859) Data Deficient
Marshallora adversa (Montagu, 1803) Verkehrtschnecke, Linksnadel Data Deficient
Marionina spicula (Leuckart, 1847) Not Threatened
Marenzelleria wireni Augener, 1913 Not Evaluated
Marenzelleria viridis (Verrill, 1873) Not Evaluated
Marenzelleria neglecta Sikorski & Bick, 2004 Not Evaluated
Manzonia crassa (Kahnmacher, 1798) Data Deficient
Manayunkia aestuarina (Bourne, 1883) Threat of Unknown Extent
Malmgreniella marphysae (McIntosh, 1876) Data Deficient
Malmgreniella lunulata (Delle Chiaje, 1830) Not Threatened
Malmgreniella ljungmani (Malmgren, 1867) Not Threatened
Malmgreniella glabra (Malmgren, 1866) Not Threatened
Malmgreniella castanea (McIntosh, 1876) Data Deficient
Malmgreniella arenicolae (Saint Joseph, 1888) Data Deficient
Malmgreniella andreapolis (McIntosh, 1874) Data Deficient
Maldane sarsi Malmgren, 1865 Data Deficient
Malacoceros tetracerus (Schmarda, 1861) Data Deficient
Malacoceros fuliginosus (Claparède, 1870) Extremely Rare
Maja squinado (Herbst, 1788) Data Deficient
Magelona wilsoni Glémarec, 1966 Data Deficient
Magelona mirabilis (Johnston, 1865) Data Deficient
Magelona minuta Eliason, 1962 Data Deficient
Magelona johnstoni Fiege, Licher & Mackie, 2000 Not Threatened
Magelona filiformis Wilson, 1959 Not Threatened
Magelona alleni Wilson, 1958 Not Threatened
Mactra stultorum (L., 1758) Gemeine Trogmuschel Threat of Unknown Extent
Macropodia rostrata (L., 1761) Gespenstkrabbe Not Threatened
Macropodia parva van Noort & Adema, 1985 Data Deficient
Macropodia linaresi Forest & Zariquiey-Alvarez, 1964 Data Deficient
Macoma calcarea (Gmelin, 1791) Kalk-Plattmuschel Threatened with Extinction
Macoma balthica (L., 1758) Baltische Tellmuschel Not Threatened
L
Lysilla loveni Malmgren, 1866 Extremely Rare
Lutraria magna (da Costa, 1778) Längliche Ottermuschel Extremely Rare
Lutraria lutraria (L., 1758) Ottermuschel Near Threatened
Lumbrineris tetraura (Schmarda, 1861) Data Deficient
Lumbrineris magnidentata Winsnes, 1981 Data Deficient
Lumbrineris latreilli Audouin & Milne-Edwards, 1834 Extremely Rare
Lumbrineris gracilis Ehlers, 1868 Not Threatened
Lumbrineris fragilis (O.F. Müller, 1776) Not Threatened
Lumbrineris aniara (Fauchald, 1974) Data Deficient
Lumbriculus variegatus (O.F. Müller, 1774) Data Deficient
Lumbriclymene cylindricaudata M. Sars in G.O. Sars, 1872 Data Deficient
Lumbricillus lineatus (O.F. Müller, 1774) Data Deficient
Lumbricillus arenarius (Michaelsen, 1889) Data Deficient
Lucinoma borealis (L., 1758) Nördliche Mondmuschel Not Threatened
Lucinella divaricata (L., 1758) Weißliche Mondmuschel Not Threatened
Lovenella clausa (Lovén, 1836) Data Deficient
Lophopus crystallinus (Pallas, 1768) Data Deficient
Littorina saxatilis (Olivi, 1792) Raue Strandschnecke Not Threatened
Littorina obtusata (L., 1758) Stumpfe Strandschnecke Not Threatened
Littorina littorea (L., 1758) Gemeine Strandschnecke Not Threatened
Littorina fabalis (Turton, 1825) Flache Strandschnecke Data Deficient
Littorina compressa Jeffreys, 1865 Extinct or Lost
Lipobranchus jeffreysii (McIntosh, 1869) Not Evaluated
Liocarcinus zariquieyi Gordon, 1968 Extremely Rare
Liocarcinus pusillus (Leach, 1815) Kleine Schwimmkrabbe Threatened
Liocarcinus navigator (Herbst, 1794) Glattstirnige Schwimmkrabbe Extremely Rare
Liocarcinus marmoreus (Leach, 1814) Marmorfarbige Schwimmkrabbe Threatened
Liocarcinus holsatus (Fabricius, 1798) Gemeine Schwimmkrabbe Not Threatened
Liocarcinus depurator (L., 1758) (Schwimmkrabbe) Not Threatened
Limnoria lignorum (Rathke, 1799) Bohrassel Data Deficient
Limnodrilus udekemianus Claparède, 1862 Not Threatened
Limnodrilus profundicola (Verrill, 1873) Data Deficient
Limnodrilus hoffmeisteri Claparède, 1862 Not Threatened
Limnodrilus claparedeanus Ratzel, 1868 Not Threatened
Limapontia senestra (Quatrefages, 1844) Finger-Lanzettschnecke Data Deficient
Limapontia depressa Alder & Hancock, 1862 Flache Lanzettschnecke Threatened
Limapontia capitata (O.F. Müller, 1774) Breitköpfige Lanzettschnecke Threat of Unknown Extent
Limacia clavigera (O.F. Müller, 1776) Limacia Not Threatened
Ligia oceanica (L., 1767) Klippenassel Not Threatened
Levinsenia gracilis (Tauber, 1879) Not Threatened
Leucothoe spinicarpa (Abildgaard, 1789) Extremely Rare
Leucothoe procera Bate, 1857 Data Deficient
Leucothoe lilljeborgi Boeck, 1861 Data Deficient
Leucothoe incisa Robertson, 1892 Not Threatened
Leucosolenia variabilis (Haeckel, 1870) Extremely Rare
Leucosolenia fragilis (Haeckel, 1870) Data Deficient
Leucosolenia complicata (Montagu, 1818) Extremely Rare
Leucosolenia botryoides (Ellis & Solander, 1786) Extremely Rare
Leuconia nivea (Grant, 1826) Extremely Rare
Leuconia johnstoni Carter, 1871 Extremely Rare
Leucon nasica (Krøyer, 1841) Data Deficient
Leuckartiara octona (Fleming, 1823) Extremely Rare
Leucandra fistulosa (Johnston, 1842) Threatened
Leptosynapta minuta (Becher, 1906) Extremely Rare
Leptosynapta inhaerens (O.F. Müller, 1776) Wurmseegurke Data Deficient
Leptosynapta bergensis (Östergren, 1905) Data Deficient
Leptopentacta elongata (Düben & Koren, 1846) Threat of Unknown Extent
Lepton squamosum (Montagu, 1803) Durchsichtige Koffermuschel Not Threatened
Leptochiton cancellatus (G.B. Sowerby II, 1840) Kleine Käferschnecke Data Deficient
Leptochiton asellus (Gmelin, 1791) Assel-Käferschnecke Threatened
Leptocheirus pilosus Zaddach, 1844 Not Threatened
Leptocheirus pectinatus (Norman, 1869) Extremely Rare
Leptocheirus hirsutimanus (Bate, 1862) Extremely Rare
Leptasterias muelleri (M. Sars, 1846) Müllers Seestern Extinct or Lost
Leptasterias arctica (Murdoch, 1885) Extinct or Lost
Lepidonotus squamatus (L., 1758) Not Threatened
Lepidochitona cinerea (L., 1767) Rändel-Käferschnecke Threatened
Lepidepecreum longicornis (Bate & Westwood, 1862) Not Threatened
Lembos websteri Bate, 1857 Not Threatened
Lekanesphaera rugicauda (Leach, 1814) Threatened
Lekanesphaera hookeri (Leach, 1814) Threat of Unknown Extent
Laonome kroeyeri Malmgren, 1866 Data Deficient
Laonice cirrata (M. Sars, 1851) Data Deficient
Laomedea neglecta Alder, 1856 Data Deficient
Laomedea flexuosa Alder, 1857 Data Deficient
Laomedea calceolifera (Hincks, 1871) Extremely Rare
Laomedea angulata Hincks, 1861 Data Deficient
Lanice conchilega (Pallas, 1766) Bäumchenröhrenwurm Not Threatened
Lamprops fasciatus G.O. Sars, 1863 Extremely Rare
Lamellaria perspicua (L., 1758) Zarte Blättchenschnecke Extremely Rare
Lagis koreni Malmgren, 1866 Gerader Köcherwurm Not Threatened
Lafoeina tenuis Sars, 1874 Data Deficient
Lafoea pygmaea Hincks, 1868 Data Deficient
Lafoea dumosa (Fleming, 1820) Extremely Rare
Laevicardium crassum (Gmelin, 1791) Not Threatened
Laetmonice filicornis Kinberg, 1856 Data Deficient
Laeospira corallinae (Silva & Knight-Jones, 1962) Extremely Rare
Lacuna vincta (Montagu, 1803) Gebänderte Grübchenschnecke Not Threatened
Lacuna parva (da Costa, 1778) Kleine Grübchenschnecke Not Threatened
Lacuna pallidula (da Costa, 1778) Flache Grübchenschnecke Data Deficient
Labidoplax buskii (McIntosh, 1866) Büschelige Seegurke Extremely Rare
K
Kurtiella bidentata (Montagu, 1803) Kleine Linsenmuschel Not Threatened
Kirchenpaueria pinnata (L., 1758) Extremely Rare
Kefersteinia cirrata (Keferstein, 1862) Data Deficient
J
Jugaria granulata (L., 1767) Threat of Unknown Extent
Jorunna tomentosa (Cuvier, 1804) Schwamm-Jorunna Data Deficient
Jassa pusilla (Sars, 1894) Extremely Rare
Jassa marmorata Holmes, 1905 Not Threatened
Jassa herdmani (Walker, 1893) Extremely Rare
Jassa falcata (Montagu, 1808) Not Threatened
Jasmineira elegans Saint Joseph, 1894 Extremely Rare
Janua pagenstecheri (Quatrefages, 1865) Extremely Rare
Janolus cristatus (delle Chiaje, 1841) Gestreifte Dickkolbenschnecke Extremely Rare
Janira maculosa Leach, 1814 Extremely Rare
Jaera albifrons Leach, 1814 Not Threatened
I
Ischyrocerus anguipes Krøyer, 1838 Data Deficient
Iphinoe trispinosa (Goodsir, 1843) Not Threatened
Iphimedia obesa Rathke, 1843 Threatened
Iphimedia minuta G.O. Sars, 1882 Data Deficient
Inachus phalangium (Fabricius, 1775) Data Deficient
Idotea pelagica Leach, 1815 Data Deficient
Idotea neglecta G.O. Sars, 1897 Data Deficient
Idotea metallica Bosc, 1802 Not Evaluated
Idotea linearis (L., 1767) Stabförmige Meerassel Not Threatened
Idotea granulosa Rathke, 1843 Körnige Meerassel Data Deficient
Idotea emarginata (Fabricius, 1793) Data Deficient
Idotea chelipes (Pallas, 1766) Krallenfüßige Meerassel Data Deficient
Idotea balthica (Pallas, 1772) Ostsee-Meerassel, Dreispitzige Meerassel Not Threatened
H
Hyperoche medusarum (Krøyer, 1838) Extremely Rare
Hyperia galba (Montagu, 1815) Not Threatened
Hypania invalida (Grube, 1860) Extremely Rare
Hydroides norvegicus Gunnerus, 1768 Extremely Rare
Hydrobia acuta (Draparnaud, 1805) Übersehene Wattschnecke Data Deficient
Hydrallmania falcata (L., 1758) Korallenmoos Extremely Rare
Hydractinia fucicola (Sars, 1857) Data Deficient
Hydractinia echinata (Fleming, 1828) Not Threatened
Hydra vulgaris Pallas, 1766 Not Evaluated
Hydra oligactis Pallas, 1766 Brauner Polyp Not Evaluated
Hyas coarctatus Leach, 1816 Nordische Meerspinne Data Deficient
Hyas araneus (L., 1758) Not Threatened
Hyalinella punctata (Hancock, 1850) Data Deficient
Hyala vitrea (Montagu, 1803) Durchscheinendes Spiralhorn Data Deficient
Homarus gammarus (L., 1758) (Europäischer) Hummer Highly Threatened
Hippomedon denticulatus (Bate, 1857) Not Threatened
Hippolyte varians Leach, 1814 Data Deficient
Hippolyte longirostris (Czerniavsky, 1868) Not Threatened
Hiatella rugosa (L., 1767) Gemeiner Felsenbohrer Extremely Rare
Hiatella arctica (L., 1767) Nördlicher Felsenbohrer Not Threatened
Heteromastus filiformis (Claparède, 1864) "Gummiwurm" Not Threatened
Heterochaeta costata Claparède, 1863 Not Threatened
Heteranomia squamula (L., 1758) Kleine Sattelmuschel Extinct or Lost
Hesionura elongata (Southern, 1914) Data Deficient
Henricia oculata (Pennant, 1777) Blutstern Data Deficient
Henlea ventriculosa (d'Udekem, 1854) Data Deficient
Hemilepton nitidum (Turton, 1822) Rundliche Koffermuschel Data Deficient
Hemilamprops roseus (Norman, 1863) Data Deficient
Hemigrapsus takanoi Asakura & Watanabe, 2005 Asiatische Strandkrabbe Not Evaluated
Hemigrapsus sanguineus (de Haan, 1835) Not Evaluated
Hediste diversicolor (O.F. Müller, 1776) Seeringelwurm Not Threatened
Haustorius arenarius (Slabber, 1769) Data Deficient
Hartlaubella gelatinosa (Pallas, 1766) Data Deficient
Harpinia pectinata G.O. Sars, 1891 Data Deficient
Harpinia laevis G.O. Sars, 1891 Data Deficient
Harpinia crenulata (Boeck, 1871) Data Deficient
Harpinia antennaria Meinert, 1890 Not Threatened
Harmothoe longisetis (Grube, 1863) Not Threatened
Harmothoe impar (Johnston, 1839) Not Threatened
Harmothoe imbricata (L., 1767) Data Deficient
Harmothoe extenuata (Grube, 1840) Extremely Rare
Harmothoe antilopes McIntosh, 1876 Not Threatened
Hardametopa nasuta (Boeck, 1871) Not Threatened
Haminoea exigua Schaefer, 1992 Data Deficient
Halopteris catharina (Johnston, 1833) Data Deficient
Halitholus yoldiaarcticae (Birula, 1897) Threatened
Halisarca dujardini Johnston, 1842 Gallertschwamm Data Deficient
Haliclystus auricula (Rathke, 1806) Extremely Rare
Haliclona urceolus (Rathke & Vahl, 1806) Extremely Rare
Haliclona rosea (Bowerbank, 1866) Extremely Rare
Haliclona oculata (Pallas, 1766) Geweihschwamm Data Deficient
Haliclona cinerea (Grant, 1826) Data Deficient
Halichondria panicea (Pallas, 1766) Brotkrumenschwamm Threat of Unknown Extent
Halichondria bowerbanki Burton, 1930 Extremely Rare
Halecium tenellum Hincks, 1861 Extremely Rare
Halecium labrosum Alder, 1859 Data Deficient
Halecium halecinum (L., 1758) Extremely Rare
Halcampa duodecimcirrata (Sars, 1851) Threatened with Extinction
G
Gyptis rosea Marion, 1875 Data Deficient
Gyptis propinqua Marion & Bobretzky, 1875 Extremely Rare
Guancha blanca Miklucho-Maclay, 1868 Data Deficient
Grania postclitellochaeta (Knöllner, 1935) Threat of Unknown Extent
Gouldia minima (Montagu, 1803) Dreieckige Venusmuschel Extremely Rare
Goodallia triangularis (Montagu, 1803) Sanddorn-Astarte Threatened
Gonothyraea loveni (Allman, 1859) Data Deficient
Goniodoris nodosa (Montagu, 1808) Weiß-Transparente Goniodoris Data Deficient
Goniadella bobretzkii (Annenkova, 1929) Not Threatened
Goniada norvegica Ørsted, 1845 Data Deficient
Goniada maculata Ørsted, 1843 Not Threatened
Goneplax rhomboides (L., 1758) Extremely Rare
Gnathia vorax (Lucas, 1849) Data Deficient
Gnathia maxillaris (Montagu, 1804) Extinct or Lost
Gnathia dentata (G. O. Sars, 1872) Extinct or Lost
Glyphohesione klatti Friedrich, 1950 Threat of Unknown Extent
Glycinde nordmanni (Malmgren, 1866) Not Threatened
Glycera unicornis Savigny in Lamarck, 1818 Data Deficient
Glycera tesselata Grube, 1840 Data Deficient
Glycera rouxi Audouin & Milne-Edwards, 1833 Data Deficient
Glycera oxycephala Ehlers, 1887 Data Deficient
Glycera lapidum Quatrefages, 1865 Data Deficient
Glycera gigantea Quatrefages, 1865 Data Deficient
Glycera convoluta Keferstein, 1862 Data Deficient
Glycera celtica O'Connor, 1987 Data Deficient
Glycera capitata Ørsted, 1843 Data Deficient
Glycera alba (O.F. Müller, 1776) Data Deficient
Gitana sarsi Boeck, 1871 Extremely Rare
Gibbula tumida (Montagu, 1803) Spitze Kreiselschnecke Data Deficient
Gibbula cineraria (L, 1758) Graue Kreiselschnecke Extremely Rare
Geitodoris planata (Alder & Hancock, 1846) Granulierte Warzenschnecke Data Deficient
Gattyana cirrhosa (Pallas, 1766) Schuppenwurm Not Threatened
Gattyana amondseni (Malmgren, 1867) Not Threatened
Garveia nutans Wright, 1859 Data Deficient
Garveia franciscana (Torrey, 1902) Not Evaluated
Gari fervensis (Gmelin, 1791) Sandmuschel Not Threatened
Gammarus zaddachi Sexton, 1912 Not Threatened
Gammarus tigrinus Sexton, 1939 Not Evaluated
Gammarus salinus Spooner, 1947 Not Threatened
Gammarus roeselii Gervais, 1835 Not Evaluated
Gammarus pulex (L., 1758) Not Evaluated
Gammarus oceanicus Segerstråle, 1947 Not Threatened
Gammarus locusta (L., 1758) Near Threatened
Gammarus inaequicauda Stock, 1966 Threat of Unknown Extent
Gammarus finmarchicus Dahl, 1938 Data Deficient
Gammarus duebeni Liljeborg, 1852 Threat of Unknown Extent
Gammarus crinicornis Stock, 1966 Data Deficient
Gammaropsis sophiae (Boeck, 1861) Data Deficient
Gammaropsis nitida (Stimpson, 1853) Not Threatened
Gammaropsis melanops G.O. Sars, 1883 Not Threatened
Gammaropsis maculata (Johnston, 1828) Data Deficient
Gammarellus homari (Fabricius, 1779) Not Threatened
Gammarellus angulosus (Rathke, 1843) Extremely Rare
Gammarella fucicola (Leach, 1814) Extremely Rare
Galathowenia oculata (Zachs, 1923) Not Threatened
Galathea strigosa (L., 1761) Extremely Rare
Galathea squamifera Leach, 1814 Extremely Rare
Galathea nexa Embleton, 1834 Extinct or Lost
Galathea intermedia Liljeborg, 1851 Near Threatened
Galathea dispersa Bate, 1859 Data Deficient
F
Fridericia bulbosa (Rosa, 1887) Data Deficient
Fredericella sultana (Blumenbach, 1779) Data Deficient
Flustrellidra hispida (Fabricius, 1780) Extremely Rare
Flustra foliacea (L., 1758) Blättermoostierchen Not Threatened
Flabellina verrucosa (M. Sars, 1829) Rotrückige Fadenschnecke Threatened
Flabellina pellucida (Alder & Hancock, 1843) Milchige Fadenschnecke Data Deficient
Flabellina pedata (Montagu, 1815) Rotviolette Fadenschnecke Extremely Rare
Flabelligera affinis M. Sars, 1829 Data Deficient
Fiona pinnata (Eschscholtz, 1831) Extinct or Lost
Filellum serpens (Hassall, 1848) Data Deficient
Ficopomatus enigmaticus (Fauvel, 1923) Not Evaluated
Fenestrulina malusii (Audouin, 1826) Data Deficient
Favorinus branchialis (Rathke, 1806) Favorinus-Fadenschnecke Data Deficient
Farrella repens (Farre, 1837) Data Deficient
Facelina bostoniensis (Couthouy, 1838) Drummonds Fadenschnecke Not Threatened
Facelina auriculata (O.F. Müller, 1776) Schlanke Fadenschnecke Highly Threatened
Fabriciola baltica Friedrich, 1939 Threat of Unknown Extent
Fabricia stellaris (O.F. Müller, 1774) Data Deficient
Fabricia sabella (Ehrenberg, 1836) Data Deficient
E
Exogone naidina Ørsted, 1845 Data Deficient
Exogone hebes (Webster & Benedict, 1884) Data Deficient
Eusyllis blomstrandi Malmgren, 1867 Data Deficient
Euspira pulchella (Risso, 1826) Glänzende Nabelschnecke Not Threatened
Euspira pallida (Broderip & Sowerby, 1829) Helle Nördliche Mondschnecke Data Deficient
Euspira montagui (Forbes, 1838) Ungefleckte Nabelschnecke Not Threatened
Euspira catena (da Costa, 1778) Halsband-Nabelschnecke Not Threatened
Eurydice pulchra Leach, 1815 Schöne Euridice Not Threatened
Eurydice affinis Hansen, 1905 Data Deficient
Eupolymnia nesidensis (Delle Chiaje, 1828) Extinct or Lost
Eupolymnia nebulosa (Montagu, 1818) Threat of Unknown Extent
Eunoe nodosa (M. Sars, 1861) Data Deficient
Eunereis longissima (Johnston, 1840) Not Threatened
Eunereis elittoralis (Eliason, 1962) Data Deficient
Eumida sanguinea (Ørsted, 1843) Not Threatened
Eumida punctifera (Grube, 1860) Not Threatened
Eumida minuta (Ditlevsen, 1917) Data Deficient
Eumida bahusiensis Bergström, 1914 Not Threatened
Eumida arctica (Annenkova, 1946) Data Deficient
Eulimella acicula (Philippi, 1836) Nadel-Pyramidenschnecke Extinct or Lost
Eulalia viridis (L., 1767) Data Deficient
Eulalia expusilla Pleijel, 1987 Extremely Rare
Eulalia bilineata (Johnston, 1840) Threat of Unknown Extent
Eugyra pedunculata Traustedt, 1886  Extinct or Lost
Eugyra glutinans (Moeller, 1842) Extinct or Lost
Eugyra arenosa (Alder & Hancock, 1848) Extinct or Lost
Eudorellopsis deformis (Krøyer, 1846) Not Threatened
Eudorella truncatula (Bate, 1856) Not Threatened
Eudorella emarginata (Krøyer, 1846) Not Threatened
Eudendrium ramosum (L., 1758) Data Deficient
Eudendrium rameum (Pallas, 1766) Data Deficient
Eudendrium capillare Alder, 1856 Data Deficient
Eudendrium album Nutting, 1898 Data Deficient
Eucratea loricata (L., 1758) Near Threatened
Euchone papillosa (M. Sars, 1851) Highly Threatened
Eucheilota maculata Hartlaub, 1894 Data Deficient
Eubranchus tricolor Forbes, 1838 Dreifarbige Ballon-Fadenschnecke Data Deficient
Eubranchus pallidus (Alder & Hancock, 1842) Blasige Ballon-Fadenschnecke Data Deficient
Eubranchus farrani (Alder & Hancock, 1844) Orangegepunktete Ballon-Fadenschnecke Data Deficient
Eubranchus exiguus (Alder & Hancock, 1848) Ballon-Fadenschnecke Data Deficient
Eualus pusiolus (Krøyer, 1841) Data Deficient
Eualus occultus (Lebour, 1936) Extremely Rare
Eualus gaimardii (H. Milne-Edwards, 1837) Data Deficient
Eualus cranchii (Leach, 1817) Extremely Rare
Eteone spetsbergensis Malmgren, 1865 Data Deficient
Eteone pusilla Ørsted, 1843 Data Deficient
Eteone longa (Fabricius, 1780) Not Threatened
Eteone lactea Claparède, 1868 Data Deficient
Eteone foliosa Quatrefages, 1866 Not Threatened
Eteone flava (Fabricius, 1780) Not Threatened
Eteone barbata Malmgren, 1865 Not Threatened
Escharoides coccinea (Abildgaard, 1806) Extinct or Lost
Escharella variolosa (Johnston, 1838) Extremely Rare
Escharella immersa (Fleming, 1828) Not Threatened
Eriopisa elongata (Bruzelius, 1859) Not Threatened
Eriocheir sinensis H. Milne-Edwards, 1853 Wollhandkrabbe Not Evaluated
Erinaceusyllis erinaceus (Claparède, 1863) Data Deficient
Ericthonius punctatus (Bate, 1857) Not Threatened
Ericthonius difformis Milne-Edwards, 1830 Data Deficient
Ercolania coerulea Trinchese, 1892  Extinct or Lost
Epitonium dallianum (Verrill & Smith, 1880) Extinct or Lost
Epitonium clathrus (L., 1758) Unechte Wendeltreppe Data Deficient
Epitonium clathratulum (Kanmacher, 1798) Weiße Wendeltreppe Not Threatened
Epigamia alexandri (Malmgren, 1867) Data Deficient
Ephydatia muelleri (Lieberkühn, 1856) Not Evaluated
Ephydatia fluviatilis (L., 1759) Not Evaluated
Ensis siliqua (L., 1758) Schotenmuschel Threat of Unknown Extent
Ensis magnus Schumacher,1817 Gerade Scheidenmuschel Threatened
Ensis ensis (L., 1758) Schwertförmige Messerscheide Highly Threatened
Ensis directus (Conrad, 1843) Amerikanische Scheidenmuschel Not Evaluated
Ennucula tenuis (Montagu, 1808) Dünnschalige Nussmuschel Not Threatened
Enipo kinbergi Malmgren, 1866 Extremely Rare
Enipo elisabethae McIntosh, 1900 Data Deficient
Enchytraeus albidus Henle, 1837 Data Deficient
Elysia viridis (Montagu, 1804) Grüne Samtschnecke Extremely Rare
Elminius modestus Darwin, 1854 Not Evaluated
Electra pilosa (L., 1767) Zottige Seerinde Not Threatened
Electra monostachys (Busk, 1854) Extremely Rare
Elasmopus rapax Costa, 1853 Extremely Rare
Ekmania barthii (Troschel, 1846) Data Deficient
Einhornia crustulenta (Pallas, 1766) Not Threatened
Edwardsia danica Carlgren, 1921 Data Deficient
Ectopleura larynx (Ellis & Solander, 1786) Röhrenpolyp Data Deficient
Ectopleura dumortierii (Van Beneden, 1844) Data Deficient
Ecrobia ventrosa (Montagu, 1803) Bauchige Wattschnecke Threat of Unknown Extent
Echiurus echiurus (Pallas, 1767) Quappwurm, Igelwurm Highly Threatened
Echinus esculentus L., 1758 Essbarer Seeigel Threat of Unknown Extent
Echinogammarus stoerensis (Reid, 1938) Data Deficient
Echinogammarus pirloti (Sexton & Spooner, 1940) Data Deficient
Echinogammarus marinus (Leach, 1815) Data Deficient
Echinocyamus pusillus (O.F. Müller, 1776) Kleiner Schildigel, Zwergseeigel Threat of Unknown Extent
Echinocardium pennatifidum Norman, 1868 Großer Herzseeigel Threat of Unknown Extent
Echinocardium flavescens (O.F. Müller, 1776) Nordischer Herzigel Threat of Unknown Extent
Echinocardium cordatum (Pennant, 1777) Kleiner Herzseeigel Not Threatened
Ebalia tumefacta (Montagu, 1808) Threatened
Ebalia tuberosa (Pennant, 1777) Data Deficient
Ebalia granulosa Milne-Edwards, 1837 Data Deficient
Ebalia cranchii Leach, 1817 Not Threatened
Ebala nitidissima (Montagu, 1803) Glänzende Zwergturmschnecke Data Deficient
D
Dysidea pallescens (Schmidt, 1862) Extremely Rare
Dysidea fragilis (Montagu, 1818) Extremely Rare
Dyopedos porrectus (Bate, 1857) Data Deficient
Dyopedos monacantha (Metzger, 1875) Not Threatened
Dynamena pumila (L., 1758) Data Deficient
Dulichia falcata (Bate, 1857) Not Threatened
Drilonereis filum (Claparède, 1868) Extremely Rare
Doto tuberculata Lemche, 1976 Extinct or Lost
Doto fragilis (Forbes, 1838) Fragile oder zarte Doto Extremely Rare
Doto coronata (Gmelin, 1791) Doto Threatened
Dosinia lupinus (L., 1758) Glatte Artemis Data Deficient
Dosinia exoleta (L., 1758) Artemismuschel Threat of Unknown Extent
Doris pseudoargus Rapp, 1827 Meerzitrone Extremely Rare
Donax vittatus (da Costa, 1778) Sägezähnchen Threat of Unknown Extent
Donax trunculus L., 1758 Extinct or Lost
Dodecaceria concharum Ørsted, 1843 Data Deficient
Disporella hispida (Fleming, 1828) Extremely Rare
Dipolydora quadrilobata (Jacobi, 1883) Not Threatened
Dipolydora giardi (Mesnil, 1896) Data Deficient
Dipolydora flava Claparède, 1870 Data Deficient
Dipolydora coeca (Ørsted, 1843) Not Threatened
Dipolydora caulleryi (Mesnil, 1897) Data Deficient
Diplosoma migrans (Menker & Ax, 1970) Extremely Rare
Diplosoma listerianum (Milne-Edwards, 1841) Data Deficient
Diplocirrus glaucus (Malmgren, 1867) Not Threatened
Diphasia rosacea (L., 1758) Extremely Rare
Diphasia attenuata (Hincks, 1866) Extremely Rare
Diogenes pugilator (Roux, 1829) Data Deficient
Didemnum maculosum (Milne-Edwards, 1841) Extremely Rare
Dicoryne conferta (Alder, 1856) Data Deficient
Diastyloides biplicatus (G.O. Sars, 1865) Data Deficient
Diastylis tumida (Liljeborg, 1855) Extremely Rare
Diastylis spinulosa Heller, 1875  Extinct or Lost
Diastylis rugosa Sars, 1865 Data Deficient
Diastylis rathkei (Krøyer, 1841) Not Threatened
Diastylis lucifera (Krøyer, 1841) Data Deficient
Diastylis laevis Norman, 1869 Not Threatened
Diastylis cornuta (Boeck, 1864) Data Deficient
Diastylis bradyi Norman, 1879 Not Threatened
Diastylis boecki Zimmer, 1930 Extremely Rare
Diaphana minuta T. Brown, 1827 Enggenabelte Zwergfässchenschnecke Not Threatened
Diadumene lineata (Verrill, 1869) Threat of Unknown Extent
Diadumene cincta Stephenson, 1925 Not Evaluated
Dexamine thea Boeck, 1861 Extremely Rare
Dexamine spinosa (Montagu, 1813) Not Threatened
Devonia perrieri (Malard, 1904) Extremely Rare
Deshayesorchestia deshayesii (Audouin, 1826) Threat of Unknown Extent
Dero digitata (Müller, 1773) Data Deficient
Dendronotus frondosus (Ascanius, 1774) Zottige Bäumchenschnecke Near Threatened
Dendrodoa grossularia (van Beneden, 1846) Tangbeere Near Threatened
Deflexilodes subnudus (Norman, 1889) Data Deficient
C
Cylichnina umbilicata (Montagu, 1803) Data Deficient
Cylichna cylindracea (Pennant, 1777) Gemeine Becherschnecke Not Threatened
Cylichna alba (Brown, 1827) Weiße Becherschnecke Data Deficient
Cyathura carinata (Krøyer, 1847) Data Deficient
Cuthona rubescens Picton & Brown, 1978 Data Deficient
Cuthona pustulata (Alder & Hancock, 1854) Data Deficient
Cuthona nana (Alder & Hancock, 1842) Zwerg-Cuthona Data Deficient
Cuthona gymnota (Couthouy, 1838) Nackte Cuthona Data Deficient
Cuthona foliata (Forbes & Goodsir, 1839) Gestreifte Cuthona Extremely Rare
Cuthona concinna (Alder & Hancock, 1843) Silber-blaue Cuthona Data Deficient
Cuthona caerulea (Montagu, 1804) Orange-Grün-Blaue Cuthona Data Deficient
Cuthona amoena (Alder & Hancock, 1845) Blau-Weiß-Rote Cuthona Extremely Rare
Cuspidella grandis Hincks, 1868 Data Deficient
Cumopsis longipes Dohrn, 1869 Extremely Rare
Cumopsis goodsir (van Beneden, 1851) Threatened
Cumella pygmaea G.O. Sars, 1865 Threat of Unknown Extent
Cucumaria frondosa (Gunnerus, 1767) Data Deficient
Ctenodrilus serratus (Schmidt, 1857) Data Deficient
Cryptosula pallasiana (Moll, 1803) Extremely Rare
Crossaster papposus (L., 1767) Seesonne, Sonnenstern Highly Threatened
Cristatella mucedo Cuvier, 1798 Data Deficient
Crisiella producta (Smitt, 1865) Data Deficient
Crisidia cornuta (L., 1758) Extremely Rare
Crisia eburnea (L., 1758) Elfenbeinmoos Not Threatened
Crisia denticulata (Lamarck, 1816) Extremely Rare
Crisia aculeata Hassall, 1841 Extremely Rare
Criodrilus lacuum Hoffmeister, 1854 Data Deficient
Cribrilina punctata (Hassall, 1841) Not Threatened
Cressa dubia (Bate, 1857) Extremely Rare
Crepidula fornicata (L., 1758) Pantoffelschnecke Not Evaluated
Crenella decussata (Montagu, 1808) Gegitterte Crenella Not Threatened
Craterolophus convolvulus (Johnston, 1835) Extremely Rare
Crassostrea gigas (Thunberg, 1793) Pazifische Auster Not Evaluated
Crassicorophium crassicorne (Bruzelius, 1859) Not Threatened
Crassicorophium bonellii (Milne-Edwards, 1830) Not Threatened
Crangon crangon (L., 1758) Granat, Nordseekrabbe Not Threatened
Crangon allmanni Kinahan, 1857 Not Threatened
Cossura longocirrata Webser & Benedict, 1887 Data Deficient
Corystes cassivelaunus (Pennant, 1777) Maskenkrabbe Not Threatened
Coryphella gracilis (Alder & Hancock, 1844) Grazile Fadenschnecke Not Threatened
Coryne vanbenedeni Hincks, 1868 Data Deficient
Coryne pusilla Gaertner, 1774 Extremely Rare
Coryne muscoides (L., 1761) Extremely Rare
Coryne eximia Allmann, 1859 Data Deficient
Corymorpha sarsii Steenstrup, 1855 Data Deficient
Corymorpha nutans M. Sars, 1835 Not Threatened
Corophium volutator (Pallas, 1766) Schlickkrebs, Wattkrebs Not Threatened
Corophium multisetosum Stock, 1952 Threat of Unknown Extent
Corophium arenarium Crawford, 1937 Threatened
Cordylophora caspia (Pallas, 1771) Not Evaluated
Corbula gibba (Olivi, 1792) Korbmuschel Not Threatened
Conopeum seurati (Canu, 1928) Data Deficient
Conopeum reticulum (L., 1767) Not Threatened
Colus jeffreysianus (P. Fischer, 1868) Geschwollene Spindelschnecke Data Deficient
Colus gracilis (da Costa, 1778) Schlanke Spindelschnecke Data Deficient
Cognettia sphagnetorum (Veydovsky, 1877) Data Deficient
Cognettia glandulosa (Michaelsen, 1888) Data Deficient
Cochlodesma praetenue (Pulteney, 1799) Fragile Löffelmuschel Not Threatened
Clytia hemisphaerica (L., 1767) Data Deficient
Clymenura leiopygos (Grube, 1860) Data Deficient
Clitellio arenarius (O.F. Müller, 1776) Threat of Unknown Extent
Clione celata Grant, 1826 Bohrschwamm Highly Threatened
Cliona lobata Hancock, 1849 Extremely Rare
Clavelina lepadiformis (O.F. Müller, 1776) Data Deficient
Clava multicornis (Forsskål, 1775) Data Deficient
Clausinella fasciata (da Costa, 1778) Gebänderte Venusmuschel Extremely Rare
Cirratulus cirratus (O.F. Müller, 1776) Extremely Rare
Cirolana cranchi Leach, 1818 Data Deficient
Circeis spirillum (L., 1758) Extremely Rare
Ciona intestinalis (L., 1767) Schlauch-Seescheide Not Threatened
Chthamalus stellatus (Poli, 1795) Stern-Seepocke Data Deficient
Chrysallida pellucida (Dillwyn, 1817) Durchscheinende Pyramidenschnecke Not Threatened
Chrysallida multicostata (Jeffreys, 1884) Extinct or Lost
Chrysallida interstincta (J. Adams, 1797) Stumpfe Pyramidenschnecke Not Threatened
Chorizopora brongniartii (Audouin, 1826) Extremely Rare
Chone infundibuliformis Krøyer, 1856 Threat of Unknown Extent
Chone duneri Malmgren, 1867 Threat of Unknown Extent
Chelura terebrans Philippi, 1839 Data Deficient
Chelicorophium curvispinum (G.O. Sars, 1895) Not Evaluated
Cheirocratus sundevallii (Rathke, 1843) Not Threatened
Cheirocratus intermedius G.O. Sars, 1894 Not Threatened
Cheirocratus assimilis (Lilljeborg, 1852) Not Threatened
Chamelea gallina (L., 1758) Venusmuschel Threat of Unknown Extent
Chalinula loosanoffi (Hartman, 1958) Extremely Rare
Chalinula limbata (Montagu, 1818) Data Deficient
Chaetozone setosa Malmgren, 1867 Not Threatened
Chaetozone christiei Malmgren, 1867 Not Threatened
Chaetozone caputesocis (Saint Joseph, 1894) Extremely Rare
Chaetopterus variopedatus Cuvier, 1827 Data Deficient
Chaetogaster limnaei von Baer, 1827 Data Deficient
Chaetogaster diaphanus (Gruithuisen, 1828) Data Deficient
Chaetoderma nitidulum Lovén, 1844 Data Deficient
Cernosvitoviella immota (Knöllner, 1935) Data Deficient
Cerianthus lloydii Gosse, 1859 Near Threatened
Ceratocephale loveni Malmgren, 1867 Data Deficient
Cerastoderma glaucum (Bruguière, 1789) Lagunen-Herzmuschel Not Threatened
Cerastoderma edule (L., 1758) Essbare Herzmuschel Not Threatened
Celleporella hyalina (L., 1767) Extremely Rare
Cellepora pumicosa (Pallas, 1766) Extremely Rare
Caulleriella killariensis (Southern, 1914) Data Deficient
Caulleriella bioculata (Keferstein, 1862) Extremely Rare
Caridion gordoni (Bate, 1858) Extremely Rare
Carcinus maenas (L., 1758) Strandkrabbe Not Threatened
Capulus ungaricus (L., 1758) Ungarnkappe Data Deficient
Caprella tuberculata Guérin, 1836 Extremely Rare
Caprella septentrionalis Krøyer, 1838 Not Threatened
Caprella penantis Leach, 1814 Extremely Rare
Caprella mutica Schurin, 1935 Not Evaluated
Caprella linearis (L., 1767) Gespenstkrebschen Near Threatened
Caprella equilibra Say, 1818 Data Deficient
Capitomastus minimus (Langerhans, 1881) Not Threatened
Capitellides giardi Mesnil, 1897 Not Threatened
Capitella capitata (Fabricius, 1780) Not Threatened
Cancer pagurus L., 1758 Taschenkrebs Not Threatened
Cancer bellianus Johnson, 1861  Extremely Rare
Campylaspis costata (G.O. Sars, 1865) Data Deficient
Campanularia volubilis (L., 1758) Extremely Rare
Campanularia hincksii Alder, 1856 Data Deficient
Campanularia flexiosa (Hincks, 1861) Data Deficient
Calycella syringa (L., 1767) Not Threatened
Calycella gracilis Hartlaub, 1897 Data Deficient
Callopora rylandi Bobin & Prenant, 1965 Data Deficient
Callopora lineata (L., 1767) Not Threatened
Callopora dumerilii (Audouin, 1826) Extremely Rare
Callochiton septemvalvis (Montagu, 1803) Rostrote Käferschnecke Extinct or Lost
Callipallene brevirostris (Johnston, 1837) Extremely Rare
Calliostoma zizyphinum (L., 1758) Bunte Kreiselschnecke Threat of Unknown Extent
Calliopius laeviusculus (Krøyer, 1838) Not Threatened
Calliopaea bellula d'Orbigny, 1837 Schwarzmelierte Schlundsackschnecke Not Threatened
Callianassa subterranea (Montagu, 1808) Maulwurfskrebs Not Threatened
Cadlina laevis (L., 1767) Glatte Prachtsternschnecke Not Threatened
Caberea ellisii (Fleming, 1814) Extinct or Lost
B
Bylgides sarsi (Kinberg in Malmgren, 1866) Not Threatened
Byblis gaimardii (Krøyer, 1846) Data Deficient
Bulbella abscondita Braem, 1951 Data Deficient
Bugula turbinata Alder, 1857 Extremely Rare
Bugula stolonifera Ryland, 1960 Extremely Rare
Bugula plumosa (Pallas, 1766) Not Threatened
Bugula angustiloba (Lamarck, 1816) Extremely Rare
Buccinum undatum L., 1758 Wellhornschnecke Highly Threatened
Brissopsis lyrifera (Forbes, 1841) Leier-Herzigel Threat of Unknown Extent
Brania pusilla (Dujardin, 1851) Extremely Rare
Branchiostoma lanceolatum (Pallas, 1774) Lanzettfischchen, Amphioxus Threat of Unknown Extent
Branchiomma bombyx (Dalyell, 1853) Extremely Rare
Brada villosa (Rathke, 1843) Not Threatened
Bowerbankia pustulosa (Ellis & Solander, 1786) Extremely Rare
Bowerbankia imbricata (Adams, 1798) Not Threatened
Bowerbankia gracilis Leidy, 1855 Not Threatened
Bougainvillia pyramidata (Forbes & Goodsir, 1853) Data Deficient
Bougainvillia principis (Steenstrup, 1850) Data Deficient
Bougainvillia muscus (Allman, 1863) Data Deficient
Bougainvillia muscoides (Sars, 1846) Extremely Rare
Bougainvillia britannica (Forbes, 1841) Data Deficient
Botryllus schlosseri (Pallas, 1766) Not Threatened
Botrylloides leachii (Savigny, 1816) Extremely Rare
Boreotrophon truncatus (Ström, 1768) Abgestutzte Purpurschnecke Highly Threatened
Bodotria scorpioides (Montagu, 1804) Not Threatened
Bodotria pulchella (Sars, 1878) Not Threatened
Bodotria arenosa Goodsir, 1843 Threatened
Boccardiella ligerica (Ferronière, 1898) Not Threatened
Bittium reticulatum (da Costa, 1778) Kleine Gitterschnecke Threat of Unknown Extent
Bispira crassicornis (Sars, 1851) Not Threatened
Bimeria vestita Wright, 1859 Data Deficient
Biemna variantia (Bowerbank, 1858) Extremely Rare
Bicellariella ciliata (L., 1758) Extremely Rare
Bela nebula (Montagu, 1803) Perlmutt-Nadelschnecke Not Threatened
Bathyporeia tenuipes Meinert, 1877 Not Threatened
Bathyporeia sarsi Watkin, 1938 Not Threatened
Bathyporeia pilosa Lindström, 1855 Not Threatened
Bathyporeia pelagica (Bate, 1856) Not Threatened
Bathyporeia nana Toulmond, 1966 Data Deficient
Bathyporeia guilliamsoniana (Bate, 1857) Not Threatened
Bathyporeia gracilis Sars, 1891 Data Deficient
Bathyporeia elegans Watkin, 1938 Not Threatened
Barnea parva (Pennant, 1777) Not Threatened
Barnea candida (L., 1758) Weiße Bohrmuschel Not Threatened
Balanus improvisus Darwin, 1854 Not Evaluated
Balanus crenatus Bruguiére, 1789 Gekerbte Seepocke Not Threatened
Balanus balanus (L., 1758) Data Deficient
A
Azorinus chamasolen (da Costa, 1778) Not Threatened
Axionice maculata (Dalyell, 1853) Data Deficient
Autonoe longipes (Liljeborg, 1852) Not Threatened
Atylus vedlomensis (Bate & Westwood, 1862) Data Deficient
Atylus swammerdami (Milne-Edwards, 1830) Not Threatened
Atylus guttatus (Costa, 1851) Data Deficient
Atyaephyra desmarestii (Millet, 1831) "Süßwassergarnele" Not Evaluated
Atherospio guillei (Laubier & Ramos, 1974) Extremely Rare
Athanas nitescens (Leach, 1813) Data Deficient
Astropecten irregularis (Pennant, 1777) Nordischer Kammstern Threat of Unknown Extent
Astropecten aranciacus (L., 1758) Roter Kammstern Extinct or Lost
Asterias rubens L., 1758 Gemeiner Seestern Not Threatened
Astarte montagui (Dillwyn, 1817) Kugel-Astarte Threatened
Astarte falsteri Høpner Petersen, 2001 Falster-Astarte Data Deficient
Astarte elliptica (Brown, 1827) Elliptische Astarte Threat of Unknown Extent
Astarte borealis (Schumacher, 1817) Nördliche Astarte Threat of Unknown Extent
Astacilla longicornis (Sowerby, 1806) Extremely Rare
Assiminea grayana Flemming, 1828 Kegelige Marschschnecke Threat of Unknown Extent
Aspidelectra melolontha (Landsborough, 1852) Data Deficient
Asperarca nodulosa (O.F. Müller, 1776) Knotige Archenmuschel Extremely Rare
Ascidiella scabra (O.F. Müller, 1776) Extremely Rare
Ascidiella aspersa (O.F. Müller, 1776) Not Threatened
Ascidia virginea O.F. Müller, 1776 Extinct or Lost
Ascidia conchilega O.F. Müller, 1776 Data Deficient
Artacama proboscidea Malmgren, 1866 Not Threatened
Aricidea suecica Eliason, 1920 Not Threatened
Aricidea simonae Laubier & Ramos, 1974 Not Threatened
Aricidea roberti Hartley, 1984 Not Threatened
Aricidea minuta Southward, 1956 Not Threatened
Aricidea cerrutii Laubier, 1966 Data Deficient
Aricidea catherinae Laubier, 1967 Data Deficient
Argissa hamatipes (Norman, 1869) Not Threatened
Arenicola marina (L., 1758) Sandpier, Köderwurm Not Threatened
Arctica islandica (L., 1767) Islandmuschel Threatened
Arcopagia crassa (Pennant, 1777) Dickschalige Tellmuschel Not Threatened
Aporrhais pespelecani (L., 1758) Pelikansfuß Threat of Unknown Extent
Apohyale prevosti (Milne-Edwards, 1830) Extremely Rare
Apocorophium lacustre (Vanhöffen, 1911) Not Threatened
Aplysia punctata (Cuvier, 1803) Seehase Extremely Rare
Aplidium turbinatum (Savigny, 1816) Extremely Rare
Aplidium nordmanni (Milne-Edwards, 1841) Not Evaluated
Apistobranchus tullbergi (Théel, 1879) Not Threatened
Aphrodita aculeata L., 1761 Seemaus, Filzwurm Data Deficient
Apherusa ovalipes Norman & Scott, 1906 Not Threatened
Apherusa jurinei (Milne-Edwards, 1830) Extremely Rare
Apherusa henneguyi Chevreux & Fage, 1925 Data Deficient
Apherusa clevei G.O. Sars, 1904 Extremely Rare
Apherusa bispinosa (Bate, 1857) Threat of Unknown Extent
Aphelochaeta marioni (Saint Joseph, 1894) Not Threatened
Aphelochaeta filiformis (Keferstein, 1862) Data Deficient
Aora typica Krøyer, 1845 Data Deficient
Aora gracilis (Bate, 1857) Not Threatened
Aonides paucibranchiata Southern, 1914 Not Threatened
Aonides oxycephala (M. Sars, 1862) Data Deficient
Antalis dentalis (L., 1758) Elefantenzahn Data Deficient
Anoplodactylus pygmaeus (Hodge, 1864) Not Threatened
Anoplodactylus petiolatus (Krøyer, 1844) Not Threatened
Anoplodactylus angulatus (Dohrn, 1881) Extremely Rare
Anonyx sarsi Steele & Brunel, 1968 Extremely Rare
Anonyx lilljeborgii Boeck, 1870 Not Threatened
Anomia ephippium L., 1758 Sattelmuschel Extremely Rare
Anobothrus gracilis (Malmgren, 1865) Not Threatened
Anguinella palmata van Beneden, 1845 Data Deficient
Ancula gibbosa (Risso, 1818) Weiße Griffelschnecke Not Threatened
Ampithoe rubricata (Montagu, 1818) Not Threatened
Ampithoe ramondi Audouin, 1826 Data Deficient
Amphiura filiformis (O.F. Müller, 1776) Fadenarm-Schlangenstern, Zierlicher Schlangenstern Not Threatened
Amphiura chiajei Forbes, 1843 Grober Schlangenstern Extremely Rare
Amphitritides gracilis (Grube, 1860) Extinct or Lost
Amphitrite cirrata (O. F. Müller 1771 in O. F. Müller 1776) Threat of Unknown Extent
Amphipholis squamata (Delle Chiaje, 1828) Schuppiger Schlangenstern Near Threatened
Amphilochus neapolitanus Della Valle, 1893 Near Threatened
Amphilochus manudens Bate, 1862 Extremely Rare
Amphilochoides boecki Sars, 1892 Data Deficient
Amphilectus lobatus (Montagu, 1818) Data Deficient
Amphilectus fucorum (Esper, 1794) Extremely Rare
Amphictene auricoma (O.F. Müller, 1776) Gebogener Köcherwurm Not Threatened
Amphicteis midas (Gosse, 1855) Not Threatened
Amphicteis gunneri (M. Sars, 1835) Not Threatened
Amphichaeta sannio Kallstenius, 1892 Threat of Unknown Extent
Amphichaeta leydigi Tauber, 1879 Data Deficient
Amphiblestrum solidum (Packard, 1863) Data Deficient
Amphiblestrum flemingii (Busk, 1854) Data Deficient
Amphiblestrum auritum (Hincks, 1877) Data Deficient
Ampharete finmarchica (M. Sars, 1864) Not Threatened
Ampharete falcata Eliason, 1955 Not Threatened
Ampharete baltica Eliason, 1955 Not Threatened
Ampharete acutifrons (Grube, 1860) Not Threatened
Ampelisca typica (Bate, 1856) Threatened
Ampelisca tenuicornis Liljeborg, 1855 Not Threatened
Ampelisca spinipes Boeck, 1861 Not Threatened
Ampelisca macrocephala Liljeborg, 1852 Not Threatened
Ampelisca gibba G.O. Sars, 1883 Extremely Rare
Ampelisca diadema (Costa, 1853) Data Deficient
Ampelisca brevicornis (Costa, 1853) Not Threatened
Amauropsis islandica (Gmelin, 1791) Isländische Bohrschnecke Highly Threatened
Alvania lactea (Michaud, 1832) Milchweiße Kleinschnecke Data Deficient
Allomelita pellucida (Sars, 1882) Extremely Rare
Alkmaria romijni Horst, 1919 Threatened
Alitta virens (M. Sars, 1835) Grüner Seeringelwurm Data Deficient
Alitta succinea (Frey & Leuckart, 1847)  Data Deficient
Alentia gelatinosa (M. Sars, 1835) Extinct or Lost
Alderia modesta (Lovén, 1844) Salzwiesen-Nacktschnecke Highly Threatened
Alcyonium glomeratum (Hassall, 1843) Highly Threatened
Alcyonium digitatum L., 1758 Tote Manneshand Threatened
Alcyonidium polyoum (Hassall, 1841) Data Deficient
Alcyonidium parasiticum (Fleming, 1828) Threat of Unknown Extent
Alcyonidium mamillatum Alder, 1857 Extremely Rare
Alcyonidium hirsutum (Fleming, 1828) Data Deficient
Alcyonidium gelatinosum (L., 1761) Gallert-Moostierchen Threatened
Alcyonidium diaphanum (Hudson, 1778) Not Threatened
Alcyonidioides mytili (Dalyell, 1848) Data Deficient
Aktedrilus monospermathecus Knöllner, 1935 Data Deficient
Akera bullata O.F. Müller, 1776 Gemeine Kugelschnecke Not Threatened
Aglaophamus pulcher (Rainer, 1990) Extremely Rare
Aglaophamus agilis (Langerhans,1880) Not Threatened
Aetea truncata (Landsborough, 1852) Extremely Rare
Aequipecten opercularis (L., 1758) Gedeckte Kammmuschel Extremely Rare
Aeolosoma hemprichi Ehrenberg, 1831 Data Deficient
Aeolidiella glauca (Alder & Hancock, 1845) Braungepunktete Fadenschnecke Not Threatened
Aeolidia papillosa (L., 1761) Breitwarzige Fadenschnecke Near Threatened
Aeginina longicornis (Kroyer, 1843) Data Deficient
Adamsia palliata (O.F.Müller, 1776) Mantelaktinie Data Deficient
Adalaria proxima (Alder & Hancock, 1854) Rote Sternschnecke Not Threatened
Actinothoe sphyrodeta (Gosse, 1858) Data Deficient
Actinothoe anguicoma (Price in Johnston, 1847) Data Deficient
Actinia equina (L, 1758) Pferdeaktinie, Purpurrose Data Deficient
Acteon tornatilis (L., 1758) Gemeine Drechselschnecke Near Threatened
Acrocnida brachiata (Montagu, 1804) Langarmiger Schlangenstern Not Threatened
Aclis minor (Brown, 1827) Kleine Spitzschnecke Not Threatened
Acidostoma obesum (Bate & Westwood, 1861) Not Threatened
Achelia hispida Hodge, 1864 Extremely Rare
Achelia echinata Hodge, 1864 Not Threatened
Acaulis primarius Stimpson, 1854 Data Deficient
Acanthodoris pilosa (Abildgaard in Müller, 1789) Weichwarzige Sternschnecke Not Threatened
Acanthocardia echinata (L., 1758) Dornige Herzmuschel Threat of Unknown Extent
Abra tenuis (Montagu, 1803) Data Deficient
Abra prismatica (Montagu, 1808) Lange Pfeffermuschel Data Deficient
Abra nitida (O.F. Müller, 1776) Glänzende Tellmuschel Threat of Unknown Extent
Abra alba (W. Wood, 1802) Weisse Tellmuschel; Kleine Pfeffermuschel Not Threatened
Abludomelita obtusata (Montagu, 1813) Not Threatened
Abietinaria abietina (L., 1758) Data Deficient