| Taxonomic Group | Name | Year | Invasion Status | Population Status | Vectors |
|---|---|---|---|---|---|
| Fishes | Alosa sapidissima | 1976 | Definite | Established | Natural Dispersal |
| Mollusks-Bivalves | Mya arenaria | 1920 | Definite | Established | Fisheries Intentional |
| Crustaceans-Crayfish | Pacifastacus leniusculus | 1959 | Definite | Established | Fisheries Intentional |
| Fishes | Ptychocheilus grandis | 1989 | Definite | Established | Discarded Bait, Fisheries Accidental (not Oyster) |