| Taxon | Density |
| Thyasira Lamarck, 1818 | 707.9 |
| Pholoe Johnston, 1839 | 302 |
| Paradoneis lyra (Southern, 1914) | 269.2 |
| Laonice sarsi Söderström, 1920 | 229.1 |
| Aricidea suecica Eliason, 1920 | 190.5 |
| Spiophanes kroyeri Grube, 1860 | 141.3 |
| Glycera Lamarck, 1818 | 109.6 |
| Harpinia antennaria Meinert, 1890 | 109.6 |
| Paramphinome jeffreysii (McIntosh, 1868) | 100 |
| Chaetozone setosa Malmgren, 1867 | 89.1 |
| Caulleriella Chamberlin, 1919 | 79.4 |
| Thyasira ferruginea (Locard, 1886) | 70.8 |
| Brachydiastylis resima (Krøyer, 1846) | 70.8 |
| Ophiuroidea | 70.8 |
| Euthelepus setubalensis McIntosh, 1885 | 60.3 |
| Ampharete acutifrons (Grube, 1860) | 50.1 |
| Vaunthompsonia cristata Bate, 1858 | 50.1 |
| Sabellidae Latreille, 1825 | 50.1 |
| Polycirrus Grube, 1850 | 39.8 |
| Glycinde nordmanni (Malmgren, 1866) | 39.8 |
| Owenia fusiformis Delle Chiaje, 1844 | 39.8 |
| Levinsenia gracilis (Tauber, 1879) | 39.8 |
| Scolelepis (Scolelepis) cantabra (Rioja, 1918) | 39.8 |
| Perioculodes longimanus (Spence Bate & Westwood, 1868) | 39.8 |
| Ampelisca gibba G.O. Sars, 1883 | 30.2 |
| Eriopisa elongata (Bruzelius, 1859) | 30.2 |
| Nemertea | 30.2 |
| Ophiactis balli (W. Thompson, 1840) | 30.2 |
| Amphictene auricoma (O.F. Müller, 1776) | 30.2 |
| Exogone (Exogone) verugera (Claparède, 1868) | 30.2 |
| Nereis zonata Malmgren, 1867 | 30.2 |
| Nephtys hystricis McIntosh, 1900 | 20 |
| Kefersteinia cirrhata (Keferstein, 1862) | 20 |
| Arcturella dilatata (G. O. Sars, 1883) | 20 |
| Ampharetidae Malmgren, 1866 | 20 |
| Notomastus latericeus Sars, 1851 | 20 |
| Amphiura filiformis (O.F. Müller, 1776) | 20 |
| Astarte sulcata (da Costa, 1778) | 20 |
| Hemilamprops roseus (Norman, 1863) | 20 |
| Diastylis lucifera (Krøyer, 1837) | 10 |
| Eudorella truncatula (Bate, 1856) | 10 |
| Eudorellopsis deformis (Krøyer, 1846) | 10 |
| Leucon (Leucon) nasica (Krøyer, 1841) | 10 |
| Arctica islandica (Linnaeus, 1767) | 10 |
| Timoclea ovata (Pennant, 1777) | 10 |
| Philine quadrata (S. V. Wood, 1839) | 10 |
| Philine scabra (O. F. Müller, 1784) | 10 |
| Ampelisca tenuicornis Liljeborg, 1856 | 10 |
| Hippomedon denticulatus (Spence Bate, 1857) | 10 |
| Echinocyamus pusillus (O.F. Müller, 1776) | 10 |
| Sipuncula | 10 |
| Lagis koreni Malmgren, 1866 | 10 |
| Myriochele Malmgren, 1867 | 10 |
| Spiophanes bombyx (Claparède, 1870) | 10 |
| Polydora (Polydora) socialis (Schmarda, 1861) | 10 |
| Lumbrineris latreilli Audouin & Milne Edwards, 1833 | 10 |
| Ophelina norvegica Støp-Bowitz, 1945 | 10 |
| Terebellides stroemii Sars, 1835 | 10 |
| Goniada norvegica Örsted, 1845 | 10 |
| Ephesiella abyssorum (Hansen, 1878) | 10 |
| Nothria conchylega (Sars, 1835) | 10 |
| Ceratocephale loveni Malmgren, 1867 | 10 |
