| Crustaceans-Barnacles | Amphibalanus reticulatus | 1986 | Definite | Established | Biocontrol, Hull Fouling, Natural Dispersal |
| Cnidarians-Hydrozoans | Cordylophora caspia | 1970 | Definite | Established | Aquatic Plant Shipments, Fisheries Accidental (not Oyster), Hull Fouling |
| Algae | Cylindrospermopsis raciborskii* | 2004 | Definite | Established | Aquatic Plant Shipments, Ballast Water, Fisheries Accidental (not Oyster), Natural Dispersal |
| Mollusks-Bivalves | Dreissena polymorpha | 2005 | Definite | Established | Canal, Hull Fouling, Natural Dispersal |
| Crustaceans-Shrimp | Macrobrachium olfersii | 1974 | Definite | Established | Aquatic Plant Shipments, Ballast Water, Pet Release |
| Crustaceans-Shrimp | Penaeus monodon | 2011 | Definite | Established | Fisheries Accidental (not Oyster), Natural Dispersal |