| Arthropoda-Insects | Agasicles hygrophila* | 1966 | Definite | Established | Biocontrol |
| Arthropoda-Insects | Anisolabis maritima | 1916 | Definite | Established | Cargo, Dry Ballast |
| Crustaceans-Copepods | Argulus japonicus | 1994 | Definite | Established | Fisheries Intentional, Pet Release |
| Mollusks-Bivalves | Corbicula fluminea | 1967 | Definite | Established | Canal, Discarded Bait, Fisheries Accidental (not Oyster), Pet Release |
| Cnidarians-Hydrozoans | Cordylophora caspia | 1994 | Definite | Established | Aquatic Plant Shipments, Fisheries Accidental (not Oyster), Hull Fouling |
| Protozoans | Haplosporidium nelsoni* | 1994 | Definite | Established | Hull Fouling, Natural Dispersal, Oyster Accidental |
| Crustaceans-Isopods | Ligia exotica | 1883 | Definite | Established | Cargo, Dry Ballast |
| Mollusks-Bivalves | Mercenaria mercenaria | 1993 | Definite | Established | Fisheries Accidental (not Oyster) |
| Echinoderms | Ophiactis savignyi Lineage B | 2002 | Definite | Established | Ballast Water, Hull Fouling |
| Tunicates | Styela canopus | 1887 | Definite | Established | Hull Fouling |
| Tunicates | Styela plicata | 1877 | Definite | Established | Hull Fouling |
| Mollusks-Gastropods | Urosalpinx cinerea | 2004 | Definite | Established | Fisheries Accidental (not Oyster), Oyster Accidental |