| Taxonomic Group | Name | Year | Invasion Status | Population Status | Vectors |
|---|---|---|---|---|---|
| Cnidarians-Hydrozoans | Cordylophora caspia | 1976 | Definite | Established | Hull Fouling, Oyster Accidental |
| Crustaceans-Amphipods | Grandidierella japonica | 2002 | Definite | Established | Hull Fouling, Natural Dispersal, Oyster Accidental |
| Mollusks-Bivalves | Mya arenaria | 1917 | Definite | Established | Fisheries Intentional |
| Mollusks-Bivalves | Nuttallia obscurata | 2003 | Definite | Established | Fisheries Accidental (not Oyster), Natural Dispersal |