| Bryozoans | Amathia verticillata | None | Non-native | Established | Hull Fouling |
| Crustaceans-Barnacles | Amphibalanus amphitrite | None | Non-native | Established | Ballast Water, Hull Fouling |
| Crustaceans-Amphipods | Apocorophium acutum* | None | Non-native | Established | Ballast Water, Hull Fouling |
| Tunicates | Ascidiella aspersa | 1952 | Non-native | Established | Hull Fouling |
| Tunicates | Botryllus schlosseri | 1985 | Non-native | Established | Hull Fouling |
| Bryozoans | Bugula neritina | 2001 | Non-native | Established | Hull Fouling |
| Bryozoans | Bugulina flabellata | None | Non-native | Established | Hull Fouling |
| Bryozoans | Bugulina stolonifera | 2002 | Non-native | Established | Hull Fouling |
| Tunicates | Ciona robusta | 1928 | Non-native | Established | Hull Fouling |
| Tunicates | Ciona savignyi | 2002 | Non-native | Established | Ballast Water, Hull Fouling |
| Algae | Codium fragile ssp. Fragile | 2008 | Non-native | Established | Ballast Water, Hull Fouling |
| Bryozoans | Cryptosula pallasiana | 1997 | Non-native | Established | Hull Fouling |
| Tunicates | Didemnum perlucidum | 2015 | Non-native | Established | None |
| Algae | Melanothamnus japonicus* | 2010 | Non-native | Established | Ballast Water, Hull Fouling |
| Crustaceans-Amphipods | Monocorophium acherusicum | None | Non-native | Established | Ballast Water, Hull Fouling |
| Mollusks-Bivalves | Ostrea edulis | 2000 | Non-native | Established | Hull Fouling, Oyster Intentional |
| Crustaceans-Isopods | Paracerceis sculpta | 2002 | Non-native | Established | Ballast Water, Hull Fouling |
| Annelids-Polychaetes | Polydora hoplura | 2005 | Non-native | Established | Fisheries Accidental (not Oyster) |
| Bryozoans | Schizoporella unicornis | None | Non-native | Established | Hull Fouling |
| Algae | Stictyosiphon soriferus* | 1979 | Non-native | Established | Ballast Water, Hull Fouling |
| Tunicates | Styela plicata | None | Non-native | Established | Hull Fouling |
| Mollusks-Bivalves | Teredo navalis | None | Non-native | Established | Hull Fouling |
| Bryozoans | Watersipora arcuata | 1997 | Non-native | Established | Hull Fouling |
| Bryozoans | Watersipora subtorquata | None | Non-native | Established | Hull Fouling |