| Taxon | Density |
| Myriochele Malmgren, 1867 | 338.8 |
| Thyasira Lamarck, 1818 | 281.8 |
| Capitellidae Grube, 1862 | 208.9 |
| Sabellidae Latreille, 1825 | 141.3 |
| Tharyx Webster & Benedict, 1887 | 120.2 |
| Amphiura filiformis (O.F. Müller, 1776) | 120.2 |
| Eclysippe vanelli (Fauvel, 1936) | 109.6 |
| Aricidea catherinae Laubier, 1967 | 109.6 |
| Pholoe Johnston, 1839 | 100 |
| Nothria conchylega (Sars, 1835) | 89.1 |
| Spiophanes kroyeri Grube, 1860 | 79.4 |
| Laonice sarsi Söderström, 1920 | 70.8 |
| Ampharetidae Malmgren, 1866 | 70.8 |
| Cylichnina umbilicata (Montagu, 1803) | 70.8 |
| Nemertea | 60.3 |
| Lumbrineris latreilli Audouin & Milne Edwards, 1833 | 60.3 |
| Lumbrineris hibernica McIntosh, 1903 | 50.1 |
| Brachydiastylis resima (Krøyer, 1846) | 50.1 |
| Exogone (Exogone) verugera (Claparède, 1868) | 50.1 |
| Eudorella emarginata (Krøyer, 1846) | 39.8 |
| Ophiuroidea | 39.8 |
| Urothoe marina (Spence Bate, 1857) | 30.2 |
| Thyasira ferruginea (Locard, 1886) | 30.2 |
| Paradoneis lyra (Southern, 1914) | 30.2 |
| Caulleriella Chamberlin, 1919 | 30.2 |
| Pseudopolydora Czerniavsky, 1881 | 30.2 |
| Minuspio cirrifera (Wirén, 1883) | 20 |
| Apistobranchus tullbergi (Théel, 1879) | 20 |
| Nephtys hombergii Savigny in Lamarck, 1818 | 20 |
| Polycirrus Grube, 1850 | 20 |
| Terebellides stroemii Sars, 1835 | 20 |
| Astarte sulcata (da Costa, 1778) | 20 |
| Parvicardium minimum (R. A. Philippi, 1836) | 20 |
| Phaxas pellucidus (Pennant, 1777) | 20 |
| Timoclea ovata (Pennant, 1777) | 20 |
| Philine scabra (O. F. Müller, 1784) | 20 |
| Phoronis Wright, 1856 | 20 |
| Sipuncula | 10 |
| Ophiura affinis Lütken, 1858 | 10 |
| Ascidiacea | 10 |
| Lunatia montagui (Forbes, 1838) | 10 |
| Harpinia antennaria Meinert, 1890 | 10 |
| Gammaropsis maculata (Johnston, 1828) | 10 |
| Nuculana minuta (O. F. Müller, 1776) | 10 |
| Eteone longa (Fabricius, 1780) | 10 |
| Glycera lapidum Quatrefages, 1866 | 10 |
| Sphaerodoridium claparedeii [auct. lapsus] | 10 |
| Nereimyra punctata (O.F. Müller, 1776) | 10 |
| Gattyana cirrhosa (Pallas, 1766) | 10 |
| Hyalinoecia tubicola (O.F. Müller, 1776) | 10 |
| Ceratocephale loveni Malmgren, 1867 | 10 |
| Perioculodes longimanus (Spence Bate & Westwood, 1868) | 10 |
| Westwoodilla caecula (Spence Bate, 1857) | 10 |
| Apseudes spinosus (M. Sars, 1858) | 10 |
| Notomastus latericeus Sars, 1851 | 10 |
| Anobothrus gracilis (Malmgren, 1866) | 10 |
| Owenia fusiformis Delle Chiaje, 1844 | 10 |
