| Tunicates | Ascidiella aspersa | 2007 | Definite | Established | Hull Fouling |
| Tunicates | Botrylloides violaceus | 2003 | Definite | Established | Hull Fouling |
| Bryozoans | Bugulina simplex | 2013 | Definite | Established | Hull Fouling |
| Crustaceans-Amphipods | Caprella mutica | 2007 | Definite | Established | Hull Fouling, Natural Dispersal |
| Crustaceans-Crabs | Carcinus maenas | 2003 | Definite | Established | Dry Ballast, Hull Fouling, Natural Dispersal |
| Crustaceans-Crabs | Carcinus maenas | None | Definite | Established | None |
| Algae | Colpomenia peregrina* | 2014 | Definite | Established | Hull Fouling |
| Annelids-Polychaetes | Hediste diversicolor | 1963 | Definite | Established | Dry Ballast |
| Crustaceans-Isopods | Ianiropsis serricaudis | 2013 | Definite | Established | Hull Fouling |
| Crustaceans-Isopods | Ligia oceanica | 2018 | Definite | Established | Cargo, Hull Fouling |
| Mollusks-Gastropods | Littorina littorea | 1887 | Definite | Established | Dry Ballast, Hull Fouling, Natural Dispersal |
| Algae | Lomentaria clavellosa* | 2010 | Definite | Established | Hull Fouling |
| Algae | Melanosiphon intestinalis* | 2010 | Definite | Established | Hull Fouling, Natural Dispersal |
| Bryozoans | Membranipora membranacea | 2007 | Definite | Established | Hull Fouling |
| Mollusks-Bivalves | Ostrea edulis | 2013 | Definite | Established | Hull Fouling, Natural Dispersal |
| Crustaceans-Shrimp | Palaemon elegans | None | Definite | Established | Natural Dispersal |
| Crustaceans-Mysids | Praunus flexuosus | 2007 | Definite | Established | Ballast Water, Natural Dispersal |
| Tunicates | Styela canopus | 2007 | Definite | Established | Hull Fouling |
| Tunicates | Styela clava | 2003 | Definite | Established | Hull Fouling |
| Bryozoans | Tricellaria inopinata | 2013 | Definite | Established | Hull Fouling |
| Algae | Ulonema rhizophorum* | None | Definite | Established | None |