| Crustaceans-Cladocerans | Bosmina coregoni | 2001 | Definite | Established | None |
| Mollusks-Bivalves | Corbicula fluminea | 1999 | Definite | Established | Aquatic Plant Shipments, Discarded Bait, Fisheries Accidental (not Oyster), Pet Release |
| Cnidarians-Hydrozoans | Cordylophora caspia | 2000 | Definite | Established | Aquatic Plant Shipments, Fisheries Accidental (not Oyster), Hull Fouling |
| Crustaceans-Cladocerans | Daphnia lumholtzi | 2005 | Definite | Established | Aquatic Plant Shipments, Ballast Water, Fisheries Accidental (not Oyster), Pet Release |
| Mollusks-Bivalves | Dreissena bugensis | 2005 | Definite | Established | Ballast Water, Hull Fouling |
| Mollusks-Bivalves | Dreissena polymorpha | 1989 | Definite | Established | Ballast Water |
| Mollusks-Bivalves | Pisidium amnicum | 1985 | Definite | Established | Dry Ballast, Packing Material |
| Mollusks-Gastropods | Potamopyrgus antipodarum | 2005 | Definite | Established | Ballast Water, Fisheries Accidental (not Oyster), Hull Fouling, Natural Dispersal |
| Annelids-Oligochaetes | Ripistes parasita* | 2001 | Definite | Established | Ballast Water |
| Mollusks-Bivalves | Sphaerium corneum | 2001 | Definite | Established | Ballast Water, Dry Ballast |