| Taxonomic Group | Name | Year | Invasion Status | Population Status | Vectors |
|---|---|---|---|---|---|
| Algae | Antithamnionella spirographidis* | 1957 | Definite | Established | Hull Fouling |
| Tunicates | Botryllus schlosseri | 1985 | Definite | Established | Hull Fouling |
| Bryozoans | Bowerbankia gracilis | None | Definite | Established | None |
| Tunicates | Styela plicata | 1972 | Definite | Established | Hull Fouling |