| Algae | Antithamnionella spirographidis* | None | Definite | Estab | |
| Tunicates | Ascidiella aspersa | 1952 | Definite | Estab | |
| Tunicates | Botryllus schlosseri | 1985 | Definite | Estab | |
| Bryozoans | Bugula neritina | 1997 | Definite | Estab | |
| Crustaceans-Amphipods | Caprella scaura | 1980 | Definite | Estab | |
| Crustaceans-Crabs | Carcinus maenas | 1993 | Definite | Estab | |
| Tunicates | Ciona robusta | 1952 | Definite | Estab | |
| Algae | Codium fragile ssp. Fragile | 1889 | Definite | Estab | |
| Cnidarians-Hydrozoans | Cordylophora caspia | 2002 | Definite | Estab | |
| Cnidarians-Hydrozoans | Ectopleura crocea | 1952 | Definite | Estab | |
| Algae | Grateloupia turuturu | 2004 | Definite | Estab | |
| Crustaceans-Amphipods | Jassa marmorata | 1990 | Definite | Estab | |
| Algae | Leptosiphonia brodiei* | 1940 | Definite | Estab | |
| Mollusks-Bivalves | Magallana gigas | 1947 | Definite | Estab | |
| Algae | Melanothamnus japonicus* | 2020 | Definite | Estab | |
| Crustaceans-Amphipods | Monocorophium acherusicum | 1999 | Definite | Estab | |
| Crustaceans-Amphipods | Monocorophium insidiosum | 1999 | Definite | Estab | |
| Mollusks-Bivalves | Mytilus galloprovincialis | 2009 | Definite | Estab | |
| Annelids-Polychaetes | Polydora hoplura | 1977 | Definite | Estab | |
| Fishes | Salmo trutta* | 1864 | Definite | Estab | |
| Algae | Striaria attenuata* | 1950 | Definite | Estab | |
| Algae | Striaria attenuata* | None | Definite | Estab | |
| Mollusks-Bivalves | Theora lubrica | 1997 | Definite | Estab | |
| Algae | Undaria pinnatifida | 1988 | Definite | Estab | |
| Bryozoans | Watersipora subatra* | 2014 | Definite | Estab | |
| Bryozoans | Watersipora subtorquata | 2001 | Definite | Estab | |