Amphipholis squamata (Delle Chiaje, 1828) (additional source)
Amphitrite cirrata Müller, 1776 (additional source)
Apistobranchus tullbergi (Théel, 1879) (additional source)
Balanus balanus (Linnaeus, 1758) (additional source)
Balanus improvisus Darwin, 1854 accepted as Amphibalanus improvisus (Darwin, 1854) (additional source)
Callipallene brevirostris (Johnston, 1837) (additional source)
Caprella linearis (Linnaeus, 1767) (additional source)
Chaetopterus variopedatus (Renier, 1804) (additional source)
Chaetozone setosa Malmgren, 1867 (additional source)
Cirratulus cirratus (O. F. Müller, 1776) (additional source)
Clymenella torquata (Leidy, 1855) (additional source)
Dodecaceria concharum Örsted, 1843 (additional source)
Gattyana cirrosa (Pallas, 1766) accepted as Gattyana cirrhosa (Pallas, 1766) (additional source)
Harmothoe extenuata (Grube, 1840) (additional source)
Harmothoe imbricata (Linnaeus, 1767) (additional source)
Heteromysis (Heteromysis) formosa S. I. Smith, 1874 (additional source)
Idotea metallica Bosc, 1801 (additional source)
Lepidonotus squamatus (Linnaeus, 1758) (additional source)
Maldane sarsi Malmgren, 1865 (additional source)
Marphysa bellii (Audouin & Milne Edwards, 1833) accepted as Paucibranchia bellii (Audouin & Milne Edwards, 1833) (additional source)
Marphysa sanguinea (Montagu, 1813) (additional source)
Nephtys caeca (Fabricius, 1780) (additional source)
Nephtys ciliata (Müller, 1788) (additional source)
Nereis (Hediste) diversicolor O.F. Müller, 1776 accepted as Hediste diversicolor (O.F. Müller, 1776) (additional source)
Notoplana atomata (Müller OF, 1776) (additional source)
Obelia bidentata Clark, 1875 (additional source)
Odontosyllis fulgurans (Audouin & Milne Edwards, 1833) (additional source)
Onuphis quadricuspis M. Sars in G.O. Sars, 1872 accepted as Paradiopatra quadricuspis (M. Sars in G.O. Sars, 1872) (additional source)
Ophiopholis aculeata (Linnaeus, 1767) (additional source)
Paraonis fulgens (Levinsen, 1884) (additional source)
Pedicellina cernua (Pallas, 1774) (additional source)
Podarkeopsis Laubier, 1961 (additional source)
Polydora (Polydora) socialis (Schmarda, 1861) accepted as Dipolydora socialis (Schmarda, 1861) (additional source)
Polydora ligni Webster, 1879 accepted as Polydora cornuta Bosc, 1802 (additional source)
Pygospio elegans Claparède, 1863 (additional source)
Scoloplos armiger (Müller, 1776) (additional source)
Scruparia chelata (Linnaeus, 1758) (additional source)
Scypha ciliata (Fabricius, 1780) accepted as Sycon ciliatum (Fabricius, 1780) (additional source)
Spio filicornis (Müller, 1776) (additional source)
Spiophanes bombyx (Claparède, 1870) (additional source)
Streblospio benedicti Webster, 1879 (additional source)
Strongylocentrotus droebachiensis (O.F. Müller, 1776) (additional source)

English American tube-dwelling anemone for Ceriantheopsis americana (Agassiz in Verrill, 1864)
English ceriantharian anemone for Ceriantheopsis americana (Agassiz in Verrill, 1864)
English northern stony coral [from synonym] for Astrangia astreiformis Milne Edwards & Haime, 1849
English southern cerianthid for Ceriantheopsis americana (Agassiz in Verrill, 1864)
English star coral [from synonym] for Astrangia astreiformis Milne Edwards & Haime, 1849
English yellow flabby-sponge for Mycale (Carmia) fibrexilis (Wilson, 1894)