| Taxon | Density |
| Mysella bidentata (Montagu, 1803) | 616.6 |
| Amphiura filiformis (O.F. Müller, 1776) | 588.8 |
| Phoronis Wright, 1856 | 309 |
| Magelona F. Müller, 1858 | 245.5 |
| Pholoe Johnston, 1839 | 199.5 |
| Spiophanes bombyx (Claparède, 1870) | 169.8 |
| Nucula nitidosa Winckworth, 1930 | 134.9 |
| Thyasira Lamarck, 1818 | 131.8 |
| Nephtys hombergii Savigny in Lamarck, 1818 | 85.1 |
| Spiophanes kroyeri Grube, 1860 | 51.3 |
| Spio filicornis (Müller, 1776) | 47.9 |
| Fabulina fabula (Gmelin, 1791) | 39.8 |
| Lunatia poliana (Della Chiaje, 1826) | 39.8 |
| Abra prismatica (Montagu, 1808) | 37.2 |
| Chamelea gallina (Linnaeus, 1758) | 33.9 |
| Thracia phaseolina (Lamarck, 1818) | 30.9 |
| Goniada maculata Örsted, 1843 | 30.9 |
| Harpinia antennaria Meinert, 1890 | 22.4 |
| Echiurus echiurus (Pallas, 1766) | 20 |
| Diplocirrus glaucus (Malmgren, 1867) | 20 |
| Cylichna cylindracea (Pennant, 1777) | 20 |
| Moerella pygmaea (Lovén, 1846) | 20 |
| Dosinia lupinus (Linnaeus, 1758) | 17 |
| Amphictene auricoma (O.F. Müller, 1776) | 17 |
| Scoloplos armiger (Müller, 1776) | 14.1 |
| Phaxas pellucidus (Pennant, 1777) | 14.1 |
| Nemertea | 14.1 |
| Echinocardium cordatum (Pennant, 1777) | 14.1 |
| Glycinde nordmanni (Malmgren, 1866) | 11.2 |
| Ampelisca tenuicornis Liljeborg, 1856 | 11.2 |
| Poecilochaetus serpens Allen, 1904 | 11.2 |
| Anthozoa | 8.5 |
| Magelona alleni Wilson, 1958 | 8.5 |
| Sigalion mathildae Audouin & Milne Edwards, 1832 | 8.5 |
| Synelmis klatti (Friedrich, 1950) | 8.5 |
| Enteropneusta | 8.5 |
| Eudorella truncatula (Bate, 1856) | 5.8 |
| Tellimya ferruginosa (Montagu, 1808) | 5.8 |
| Anaitides subulifera Eliason, 1962 | 5.8 |
| Glycera alba (O.F. Müller, 1776) | 2.8 |
| Pectinaria (Pectinaria) belgica (Pallas, 1766) | 2.8 |
| Owenia fusiformis Delle Chiaje, 1844 | 2.8 |
| Notomastus latericeus Sars, 1851 | 2.8 |
| Ensis Schumacher, 1817 | 2.8 |
| Nuculoma tenuis (Montagu, 1808) | 2.8 |
| Eudorellopsis deformis (Krøyer, 1846) | 2.8 |
| Callianassa subterranea (Montagu, 1808) | 2.8 |
| Argissa hamatipes (Norman, 1869) | 2.8 |
| Ampelisca brevicornis (A. Costa, 1853) | 2.8 |
| Harmothoe Kinberg, 1856 | 2.8 |
| Amphiura (Acrocnida) brachiata (Montagu, 1804) | 2.8 |
| Ophiura albida Forbes, 1839 | 2.8 |
| Arctica islandica (Linnaeus, 1767) | 2.8 |
