| Taxon | Density |
| Ophelia borealis Quatrefages, 1866 | 498.4 |
| Exogone (Parexogone) hebes (Webster & Benedict, 1884) | 251.2 |
| Streptosyllis websteri Southern, 1914 | 141.3 |
| Glycera lapidum Quatrefages, 1866 | 132.5 |
| Echinocyamus pusillus (O.F. Müller, 1776) | 129.1 |
| Ophiura affinis Lütken, 1858 | 109.6 |
| Goniada maculata Örsted, 1843 | 46.7 |
| Polycirrus Grube, 1850 | 39.8 |
| Anthozoa | 38.9 |
| Antalis entalis (Linnaeus, 1758) | 36.8 |
| Moerella pygmaea (Lovén, 1846) | 34.3 |
| Owenia fusiformis Delle Chiaje, 1844 | 33.4 |
| Prionospio malmgreni Claparède, 1868 | 30.2 |
| Scolelepis squamata (Müller, 1806) | 30.2 |
| Sipuncula | 30.2 |
| Sabellidae Latreille, 1825 | 25.1 |
| Poecilochaetus serpens Allen, 1904 | 21.9 |
| Notomastus latericeus Sars, 1851 | 21 |
| Myriochele Malmgren, 1867 | 21 |
| Thracia phaseolina (Lamarck, 1818) | 20.1 |
| Abra nitida (O. F. Müller, 1776) | 20 |
| Sphaerosyllis bulbosa Southern, 1914 | 20 |
| Unciola planipes Norman, 1867 | 20 |
| Pseudocuma (Pseudocuma) simile G.O. Sars, 1900 | 20 |
| Guernea (Guernea) coalita (Norman, 1868) | 20 |
| Hesionura elongata (Southern, 1914) | 20 |
| Mystides southerni (Banse, 1954) | 20 |
| Glycera Lamarck, 1818 | 20 |
| Aricidea cerrutii Laubier, 1966 | 20 |
| Aonides paucibranchiata Southern, 1914 | 18.5 |
| Caulleriella Chamberlin, 1919 | 16 |
| Nemertea | 12.5 |
| Amphiura filiformis (O.F. Müller, 1776) | 10.9 |
| Sthenelais limicola (Ehlers, 1864) | 10.9 |
| Eteone longa (Fabricius, 1780) | 10 |
| Pista cristata (Müller, 1776) | 10 |
| Glycera celtica O'Connor, 1987 | 10 |
| Glycera rouxii Audouin & Milne Edwards, 1833 | 10 |
| Chaetozone setosa Malmgren, 1867 | 10 |
| Spiophanes kroyeri Grube, 1860 | 10 |
| Pholoe Johnston, 1839 | 10 |
| Rhodine gracilior Tauber, 1879 | 10 |
| Ampelisca tenuicornis Liljeborg, 1856 | 10 |
| Hippomedon denticulatus (Spence Bate, 1857) | 10 |
| Eurydice pulchra Leach, 1816 | 10 |
| Exogone (Exogone) verugera (Claparède, 1868) | 10 |
| Abra prismatica (Montagu, 1808) | 10 |
| Limatula subauriculata (Montagu, 1808) | 10 |
| Nudibranchia | 10 |
| Anobothrus gracilis (Malmgren, 1866) | 9.2 |
| Nephtys longosetosa Örsted, 1842 | 8.3 |
| Spisula elliptica (T. Brown, 1827) | 8.3 |
| Ophiura albida Forbes, 1839 | 8.3 |
| Echinocardium flavescens (O.F. Müller, 1776) | 8.3 |
| Moerella donacina (Linnaeus, 1758) | 6.8 |
| Bathyporeia elegans Watkin, 1938 | 6.8 |
| Cochlodesma (Bontaea) praetenue (Pulteney, 1799) | 6.8 |
| Aricidea minuta Southward, 1956 | 6.8 |
| Minuspio cirrifera (Wirén, 1883) | 5 |
| Leptochiton asellus (Gmelin, 1791) | 5 |
| Tridonta montagui (Dillwyn, 1817) | 5 |
| Holothuroidea | 3.3 |
| Astarte sulcata (da Costa, 1778) | 3.3 |
| Crenella decussata (Montagu, 1808) | 3.3 |
| Glycymeris glycymeris (Linnaeus, 1758) | 3.3 |
| Maera othonis (H. Milne Edwards, 1830) | 3.3 |
| Atylus vedlomensis (Spence Bate & Westwood, 1862) | 3.3 |
| Nereis zonata Malmgren, 1867 | 3.3 |
| Syllidae Grube, 1850 | 3.3 |
| Spiophanes bombyx (Claparède, 1870) | 3.3 |
| Scoloplos armiger (Müller, 1776) | 3.3 |
| Polycirrus medusa Grube, 1850 | 3.3 |
| Capitellidae Grube, 1862 | 3.3 |
| Hydroides norvegica Gunnerus, 1768 | 3.3 |
| Glycinde nordmanni (Malmgren, 1866) | 1.7 |
| Lumbrineris latreilli Audouin & Milne Edwards, 1833 | 1.7 |
| Praxillura longissima Arwidsson, 1906 | 1.7 |
| Cirratulus cirratus (O. F. Müller, 1776) | 1.7 |
| Harmothoe Kinberg, 1856 | 1.7 |
| Abludomelita gladiosa (Spence Bate & Westwood, 1862) | 1.7 |
| Abludomelita obtusata (Montagu, 1813) | 1.7 |
| Thyasira Lamarck, 1818 | 1.7 |
| Lunatia poliana (Della Chiaje, 1826) | 1.7 |
| Timoclea ovata (Pennant, 1777) | 1.7 |
