Aurelia aurita (Linnaeus, 1758) (additional source)
Botryllus schlosseri (Pallas, 1766) (additional source)
Bowerbankia gracilis Leidy, 1855 accepted as Amathia gracilis (Leidy, 1855) (additional source)
Callinectes sapidus Rathbun, 1896 (additional source)
Ciona intestinalis (Linnaeus, 1767) (additional source)
Cliona celata Grant, 1826 (additional source)
Cryptosula pallasiana (Moll, 1803) (additional source)
Cucumaria frondosa (Gunnerus, 1767) (additional source)
Cyanea capillata (Linnaeus, 1758) (additional source)
Electra pilosa (Linnaeus, 1767) accepted as Electra pilosa (Linnaeus, 1761) (additional source)
Gonionemus vertens A. Agassiz, 1862 (additional source)
Haliclona (Haliclona) oculata (Linnaeus, 1759) (additional source)
Halisarca dujardinii Johnston, 1842 (additional source)
Idotea balthica (Pallas, 1772) (additional source)
Melicertum octocostatum (M. Sars, 1835) (additional source)
Nereis pelagica Linnaeus, 1758 (additional source)
Obelia geniculata (Linnaeus, 1758) (additional source)
Pedicellina cernua (Pallas, 1774) (additional source)
Petricola pholadiformis Lamarck, 1818 accepted as Petricolaria pholadiformis (Lamarck, 1818) (additional source)
Phoxichilidium femoratum (Rathke, 1799) (additional source)
Pleurobrachia pileus (O. F. Müller, 1776) (additional source)
Schizoporella unicornis (Johnston in Wood, 1844) (additional source)