| Taxon | Density |
| Ophelia borealis Quatrefages, 1866 | 1427.4 |
| Exogone (Parexogone) hebes (Webster & Benedict, 1884) | 285.3 |
| Hippomedon denticulatus (Spence Bate, 1857) | 208.9 |
| Scopelocheirus hopei (A. Costa in Hope, 1851) | 199.5 |
| Glycera lapidum Quatrefages, 1866 | 136.4 |
| Ophiuroidea | 128.8 |
| Sphaerosyllis bulbosa Southern, 1914 | 120.2 |
| Guernea (Guernea) coalita (Norman, 1868) | 70.8 |
| Streptosyllis websteri Southern, 1914 | 60.3 |
| Eumida sanguinea (Örsted, 1843) | 50.1 |
| Echinocyamus pusillus (O.F. Müller, 1776) | 37.7 |
| Goniada maculata Örsted, 1843 | 31.7 |
| Exogone (Exogone) verugera (Claparède, 1868) | 30.2 |
| Hydroides norvegica Gunnerus, 1768 | 30.2 |
| Anthozoa | 28.2 |
| Aonides paucibranchiata Southern, 1914 | 24.9 |
| Sabellaria spinulosa (Leuckart, 1849) | 21.9 |
| Anaitides groenlandica (Örsted, 1842) | 20 |
| Ascidiacea | 20 |
| Tharyx Webster & Benedict, 1887 | 15.1 |
| Pholoe Johnston, 1839 | 12.5 |
| Ophiura albida Forbes, 1839 | 11.7 |
| Dexamine spinosa (Montagu, 1813) | 10 |
| Pisione remota (Southern, 1914) | 10 |
| Eteone longa (Fabricius, 1780) | 10 |
| Caulleriella Chamberlin, 1919 | 10 |
| Scolelepis squamata (Müller, 1806) | 10 |
| Trypanosyllis coeliaca Claparède, 1868 | 10 |
| Nephtys hombergii Savigny in Lamarck, 1818 | 10 |
| Nothria conchylega (Sars, 1835) | 10 |
| Pseudocuma longicornis (Bate) | 10 |
| Metaphoxus fultoni (Scott, 1890) | 10 |
| Ampelisca tenuicornis Liljeborg, 1856 | 10 |
| Limatula subauriculata (Montagu, 1808) | 10 |
| Leptochiton asellus (Gmelin, 1791) | 10 |
| Nebalia bipes (Fabricius, 1780) | 8.4 |
| Aricidea cerrutii Laubier, 1966 | 8.4 |
| Antalis entalis (Linnaeus, 1758) | 8.3 |
| Maera othonis (H. Milne Edwards, 1830) | 7.5 |
| Ophelina norvegica Støp-Bowitz, 1945 | 6.8 |
| Chaetozone setosa Malmgren, 1867 | 6.8 |
| Myriochele Malmgren, 1867 | 6.8 |
| Glycera rouxii Audouin & Milne Edwards, 1833 | 6.8 |
| Nemertea | 6.8 |
| Sabellidae Latreille, 1825 | 5.1 |
| Protula tubularia (Montagu, 1803) | 5 |
| Capitellidae Grube, 1862 | 5 |
| Praxillura longissima Arwidsson, 1906 | 5 |
| Spiophanes bombyx (Claparède, 1870) | 5 |
| Minuspio cirrifera (Wirén, 1883) | 5 |
| Atylus vedlomensis (Spence Bate & Westwood, 1862) | 5 |
| Sipuncula | 3.4 |
| Holothuroidea | 3.3 |
| Timoclea ovata (Pennant, 1777) | 3.3 |
| Thracia phaseolina (Lamarck, 1818) | 3.3 |
| Lumbrineris latreilli Audouin & Milne Edwards, 1833 | 3.3 |
| Lumbrineris tetraura (Schmarda, 1861) | 3.3 |
| Spiophanes kroyeri Grube, 1860 | 3.3 |
| Glycera oxycephala Ehlers, 1887 | 3.3 |
| Eteone foliosa Quatrefages, 1866 | 3.3 |
| Lepidonotus squamatus (Linnaeus, 1758) | 3.3 |
| Owenia fusiformis Delle Chiaje, 1844 | 1.7 |
| Glycinde nordmanni (Malmgren, 1866) | 1.7 |
| Glycera celtica O'Connor, 1987 | 1.7 |
| Scolelepis (Scolelepis) cantabra (Rioja, 1918) | 1.7 |
| Scolelepis tridentata (Southern, 1914) | 1.7 |
| Cirratulus cirratus (O. F. Müller, 1776) | 1.7 |
| Scoloplos armiger (Müller, 1776) | 1.7 |
| Aricidea suecica Eliason, 1920 | 1.7 |
| Poecilochaetus serpens Allen, 1904 | 1.7 |
| Phoronis muelleri Selys-Longchamps, 1903 | 1.7 |
| Tridonta montagui (Dillwyn, 1817) | 1.7 |
| Spisula elliptica (T. Brown, 1827) | 1.7 |
| Moerella pygmaea (Lovén, 1846) | 1.7 |
| Abra nitida (O. F. Müller, 1776) | 1.7 |
| Abra prismatica (Montagu, 1808) | 1.7 |
| Gammaropsis maculata (Johnston, 1828) | 1.7 |
| Modiolus modiolus (Linnaeus, 1758) | 1.7 |
| Abludomelita obtusata (Montagu, 1813) | 1.7 |
| Perioculodes longimanus (Spence Bate & Westwood, 1868) | 1.7 |
| Urothoe elegans Spence Bate, 1857 | 1.7 |
| Kefersteinia cirrhata (Keferstein, 1862) | 1.7 |
| Nephtys caeca (Fabricius, 1780) | 1.7 |
| Eunoe nodosa (M. Sars, 1861) | 1.7 |
| Echinocardium flavescens (O.F. Müller, 1776) | 1.7 |
| Ophiura affinis Lütken, 1858 | 1.7 |
