| Taxonomic Group | Name | Year | Invasion Status | Population Status | Vectors |
|---|---|---|---|---|---|
| Crustaceans-Crabs | Carcinus maenas | 1817 | Definite | Established | Dry Ballast, Hull Fouling |
| Mollusks-Gastropods | Littorina littorea | 1880 | Definite | Established | Dry Ballast, Hull Fouling, Natural Dispersal |