| Fishes | Alosa sapidissima | 1893 | Definite | Established | Natural Dispersal |
| Platyhelminthes | Austrobilharzia variglandis* | 2003 | Definite | Established | Oyster Accidental |
| Mollusks-Gastropods | Batillaria attramentaria | 1959 | Definite | Established | Oyster Accidental |
| Tunicates | Botrylloides violaceus | 1998 | Definite | Established | Hull Fouling |
| Mollusks-Gastropods | Cecina manchurica | 1963 | Definite | Established | Oyster Accidental |
| Annelids-Polychaetes | Clymenella torquata | 1976 | Definite | Established | Oyster Accidental |
| Mollusks-Bivalves | Crassostrea virginica | 1895 | Definite | Established | Oyster Intentional |
| Mollusks-Gastropods | Crepidula convexa | 1988 | Definite | Established | Oyster Accidental |
| Mollusks-Gastropods | Haloa japonica | 2011 | Definite | Established | Hull Fouling, Oyster Accidental |
| Platyhelminthes | Himasthla quissetensis* | 2003 | Definite | Established | Oyster Accidental |
| Mollusks-Gastropods | Ilyanassa obsoleta | 1952 | Definite | Established | Oyster Accidental |
| Mollusks-Bivalves | Magallana gigas | 1926 | Definite | Established | Oyster Intentional |
| Mollusks-Bivalves | Mya arenaria | 1976 | Definite | Established | Fisheries Intentional |
| Mollusks-Gastropods | Myosotella myosotis | 1963 | Definite | Established | Cargo, Dry Ballast, Oyster Accidental |
| Mollusks-Gastropods | Nassarius fraterculus | 1977 | Definite | Established | None |
| Mollusks-Bivalves | Neotrapezium liratum | 2006 | Definite | Established | Oyster Accidental |
| Mollusks-Bivalves | Nuttallia obscurata | 1991 | Definite | Established | Ballast Water |
| Mollusks-Gastropods | Ocinebrellus inornatus | 1931 | Definite | Established | Oyster Accidental |
| Mollusks-Bivalves | Ruditapes philippinarum | 1963 | Definite | Established | Oyster Accidental |
| Algae | Sargassum muticum | None | Definite | Established | Oyster Accidental |
| Bryozoans | Schizoporella japonica | 1974 | Definite | Established | Hull Fouling, Oyster Accidental |
| Tunicates | Styela clava | 1998 | Definite | Established | Hull Fouling |
| Protozoans | Trochammina hadai* | 1971 | Definite | Established | Ballast Water, Oyster Accidental, Unknown Vector |
| Annelids-Oligochaetes | Tubificoides diazi* | 1984 | Definite | Established | Ballast Water, Dry Ballast, Oyster Accidental |
| Mollusks-Gastropods | Urosalpinx cinerea | 1931 | Definite | Established | Oyster Accidental |