| Fishes | Acanthogobius flavimanus | 1990 | Definite | Estab | |
| Annelids-Polychaetes | Alitta succinea | 1978 | Definite | Estab | |
| Bryozoans | Amathia distans | 1915 | Definite | Estab | |
| Bryozoans | Amathia verticillata | 1975 | Definite | Estab | |
| Crustaceans-Barnacles | Amphibalanus amphitrite | 1969 | Definite | Estab | |
| Algae | Antithamnionella spirographidis* | 1976 | Definite | Estab | |
| Mollusks-Bivalves | Arcuatula senhousia | 1987 | Definite | Estab | |
| Tunicates | Ascidiella aspersa | 1899 | Definite | Estab | |
| Tunicates | Botryllus schlosseri | 1977 | Definite | Estab | |
| Cnidarians-Hydrozoans | Bougainvillia muscus | 1971 | Definite | Estab | |
| Bryozoans | Bowerbankia gracilis | 1974 | Definite | Estab | |
| Bryozoans | Bugula neritina | 1881 | Definite | Estab | |
| Bryozoans | Bugulina flabellata | 1899 | Definite | Estab | |
| Bryozoans | Bugulina simplex | 1982 | Definite | Estab | |
| Bryozoans | Bugulina stolonifera | 1885 | Definite | Estab | |
| Crustaceans-Amphipods | Caprella scaura | 1990 | Definite | Estab | |
| Crustaceans-Crabs | Carcinus maenas | 1900 | Definite | Estab | |
| Crustaceans-Amphipods | Chelura terebrans | 1986 | Definite | Estab | |
| Tunicates | Ciona robusta | 1958 | Definite | Estab | |
| Cnidarians-Hydrozoans | Clytia paulensis | 1985 | Definite | Estab | |
| Algae | Codium fragile ssp. Fragile | 1890 | Definite | Estab | |
| Cnidarians-Hydrozoans | Cordylophora caspia | 1984 | Definite | Estab | |
| Bryozoans | Cryptosula pallasiana | 1890 | Definite | Estab | |
| Cnidarians-Hydrozoans | Ectopleura crocea | 1884 | Definite | Estab | |
| Algae | Grateloupia turuturu | 2010 | Definite | Estab | |
| Platyhelminthes | Gyrodactylus anguillae* | 1998 | Definite | Estab | |
| Crustaceans-Amphipods | Jassa marmorata | 1997 | Definite | Estab | |
| Algae | Leptosiphonia brodiei* | None | Definite | Estab | |
| Mollusks-Bivalves | Magallana gigas | 1960 | Definite | Estab | |
| Crustaceans-Barnacles | Megabalanus coccopoma | 2009 | Definite | Estab | |
| Algae | Melanothamnus japonicus* | 2020 | Definite | Estab | |
| Tunicates | Molgula manhattensis | 1967 | Definite | Estab | |
| Crustaceans-Amphipods | Monocorophium acherusicum | 1963 | Definite | Estab | |
| Crustaceans-Amphipods | Monocorophium insidiosum | 1973 | Definite | Estab | |
| Mollusks-Bivalves | Mya japonica* | 2018 | Definite | Estab | |
| Mollusks-Gastropods | Myosotella myosotis | 1992 | Definite | Estab | |
| Mollusks-Bivalves | Mytilus galloprovincialis | None | Definite | Estab | |
| Mollusks-Gastropods | Okenia plana | 1977 | Definite | Estab | |
| Crustaceans-Isopods | Paracerceis sculpta | 1995 | Definite | Estab | |
| Cnidarians-Hydrozoans | Plumularia setacea | 1885 | Definite | Estab | |
| Mollusks-Gastropods | Polycera hedgpethi | 1973 | Definite | Estab | |
| Annelids-Polychaetes | Polydora cornuta | 1978 | Definite | Estab | |
| Annelids-Polychaetes | Polydora hoplura | 1975 | Definite | Estab | |
| Algae | Polysiphonia senticulosa* | 1969 | Definite | Estab | |
| Annelids-Polychaetes | Pseudopolydora paucibranchiata | 1975 | Definite | Estab | |
| Crustaceans-Crabs | Pyromaia tuberculata | 1990 | Definite | Estab | |
| Fishes | Salmo trutta* | None | Definite | Estab | |
| Bryozoans | Schizoporella unicornis | None | Definite | Estab | |
| Algae | Stictyosiphon soriferus* | 1969 | Definite | Estab | |
| Tunicates | Styela clava | 1972 | Definite | Estab | |
| Tunicates | Styela plicata | 1963 | Definite | Estab | |
| Mollusks-Bivalves | Teredo navalis | None | Definite | Estab | |
| Mollusks-Gastropods | Thecacera pennigera | 2003 | Definite | Estab | |
| Mollusks-Bivalves | Theora lubrica | 1958 | Definite | Estab | |
| Fishes | Tridentiger trigonocephalus | 1977 | Definite | Estab | |
| Algae | Undaria pinnatifida | 1996 | Definite | Estab | |
| Bryozoans | Watersipora arcuata | 1973 | Definite | Estab | |
| Bryozoans | Watersipora subtorquata | 1976 | Definite | Estab | |