| Taxonomic Group | Name | Year | Invasion Status | Population Status | |
|---|---|---|---|---|---|
| Crustaceans-Crabs | Carcinus maenas | 1903 | Definite | Estab | |
| Cnidarians-Hydrozoans | Gonionemus vertens | 2000 | Definite | Estab | |
| Mollusks-Gastropods | Littorina littorea | 1996 | Definite | Estab | |
| Tunicates | Styela clava | 2003 | Definite | Estab |