| Crustaceans-Barnacles | Amphibalanus reticulatus | 1986 | Definite | Established | Ballast Water, Hull Fouling, Natural Dispersal |
| Annelids-Polychaetes | Boccardiella ligerica | 1985 | Definite | Established | Ballast Water |
| Annelids-Oligochaetes | Branchiura sowerbyi* | 1972 | Definite | Established | Aquatic Plant Shipments, Ballast Water, Dry Ballast, Fisheries Accidental (not Oyster) |
| Mollusks-Bivalves | Corbicula fluminea | 1977 | Definite | Established | Discarded Bait, Fisheries Accidental (not Oyster), Fisheries Intentional, Pet Release |
| Cnidarians-Hydrozoans | Cordylophora caspia | 1976 | Definite | Established | Aquatic Plant Shipments, Fisheries Accidental (not Oyster), Hull Fouling |
| Fishes | Cyprinus carpio | 1953 | Definite | Established | Fisheries Accidental (not Oyster), Fisheries Intentional |
| Crustaceans-Isopods | Ligia exotica | 1940 | Definite | Established | Cargo, Dry Ballast |
| Fishes | Morone saxatilis | 1977 | Definite | Established | Fisheries Intentional |
| Arthropoda-Insects | Nipponaclerda biwakoensis* | 2018 | Definite | Established | Cargo, Natural Dispersal |
| Crustaceans-Shrimp | Penaeus monodon | 2011 | Definite | Established | Fisheries Accidental (not Oyster), Natural Dispersal |
| Crustaceans-Isopods | Sphaeroma terebrans | 1945 | Definite | Established | Hull Fouling |