| Crustaceans-Barnacles | Amphibalanus amphitrite | 1914 | Definite | Estab | |
| Crustaceans-Barnacles | Amphibalanus eburneus | 1940 | Definite | Estab | |
| Crustaceans-Barnacles | Amphibalanus improvisus | 1872 | Definite | Estab | |
| Crustaceans-Amphipods | Ampithoe valida | 2015 | Definite | Estab | |
| Nematodes | Anguillicola crassus* | 2001 | Definite | Estab | |
| Algae | Antithamnion hubbsii* | 2017 | Definite | Estab | |
| Algae | Antithamnionella spirographidis* | 1910 | Definite | Estab | |
| Algae | Asparagopsis armata* | 1954 | Definite | Estab | |
| Cnidarians-Scyphozoans | Aurelia coerulea | 2003 | Definite | Estab | |
| Crustaceans-Barnacles | Austrominius modestus | 1953 | Definite | Estab | |
| Cnidarians-Hydrozoans | Blackfordia virginica | 1967 | Definite | Estab | |
| Protozoans | Bonamia ostreae* | 1979 | Definite | Estab | |
| Algae | Bonnemaisonia hamifera | 1905 | Definite | Estab | |
| Tunicates | Botrylloides diegensis | 2004 | Definite | Estab | |
| Tunicates | Botrylloides violaceus | 2005 | Definite | Estab | |
| Bryozoans | Bugula neritina | 2005 | Definite | Estab | |
| Bryozoans | Bugulina simplex | 2002 | Definite | Estab | |
| Crustaceans-Amphipods | Caprella mutica | 2018 | Definite | Estab | |
| Algae | Caulacanthus okamurae | 1988 | Definite | Estab | |
| Tunicates | Ciona robusta | None | Definite | Estab | |
| Algae | Codium fragile ssp. Fragile | 1946 | Definite | Estab | |
| Algae | Colpomenia peregrina* | 1905 | Definite | Estab | |
| Cnidarians-Hydrozoans | Cordylophora caspia | 1901 | Definite | Estab | |
| Mollusks-Gastropods | Crepidula fornicata | 1949 | Definite | Estab | |
| Algae | Dasysiphonia japonica | 2008 | Definite | Estab | |
| Cnidarians-Anthozoans | Diadumene lineata | 1900 | Definite | Estab | |
| Tunicates | Didemnum vexillum | 2002 | Definite | Estab | |
| Cnidarians-Hydrozoans | Ectopleura crocea | 1910 | Definite | Estab | |
| Crustaceans-Crabs | Eriocheir sinensis | 1954 | Definite | Estab | |
| Annelids-Polychaetes | Ficopomatus enigmaticus | 1922 | Definite | Estab | |
| Crustaceans-Amphipods | Gammarus tigrinus | 2005 | Definite | Estab | |
| Cnidarians-Hydrozoans | Gonionemus vertens | 1929 | Definite | Estab | |
| Algae | Gracilaria vermiculophylla | 1996 | Definite | Estab | |
| Algae | Gracilariopsis chorda* | 2010 | Definite | Estab | |
| Crustaceans-Amphipods | Grandidierella japonica | 2010 | Definite | Estab | |
| Algae | Grateloupia turuturu | 1988 | Definite | Estab | |
| Mollusks-Gastropods | Haloa japonica | 2003 | Definite | Estab | |
| Protozoans | Haplosporidium nelsoni* | 1993 | Definite | Estab | |
| Crustaceans-Crabs | Hemigrapsus sanguineus | 2008 | Definite | Estab | |
| Annelids-Polychaetes | Hydroides dianthus | None | Definite | Estab | |
| Bryozoans | Juxtacribrilina mutabilis | 2019 | Definite | Estab | |
| Platyhelminthes | Koinostylochus ostreophagus* | 1975 | Definite | Estab | |
| Crustaceans-Isopods | Limnoria quadripunctata | 1959 | Definite | Estab | |
| Algae | Lomentaria hakodatensis* | 1984 | Definite | Estab | |
| Mollusks-Bivalves | Magallana gigas | 1966 | Definite | Estab | |
| Mollusks-Bivalves | Mercenaria mercenaria | 1910 | Definite | Estab | |
| Ctenophores | Mnemiopsis leidyi* | 2019 | Definite | Estab | |
| Tunicates | Molgula manhattensis | 1845 | Definite | Estab | |
| Mollusks-Bivalves | Mya arenaria | 1600 | Definite | Estab | |
| Crustaceans-Copepods | Mytilicola orientalis | 1993 | Definite | Estab | |
| Annelids-Polychaetes | Neodexiospira brasiliensis | 1980 | Definite | Estab | |
| Mollusks-Gastropods | Ocinebrellus inornatus | 1995 | Definite | Estab | |
| Algae | Pachymeniopsis lanceolata* | 2008 | Definite | Estab | |
| Crustaceans-Shrimp | Palaemon macrodactylus | 2007 | Definite | Estab | |
| Tunicates | Perophora japonica | 1982 | Definite | Estab | |
| Annelids-Polychaetes | Polydora hoplura | None | Definite | Estab | |
| Annelids-Polychaetes | Polydora onagawaensis* | 2018 | Definite | Estab | |
| Mollusks-Gastropods | Potamopyrgus antipodarum | None | Definite | Estab | |
| Platyhelminthes | Pseudodactylogyrus anguillae* | 1984 | Definite | Estab | |
| Mollusks-Gastropods | Rapana venosa | 1992 | Definite | Estab | |
| Crustaceans-Crabs | Rhithropanopeus harrisii | 1971 | Definite | Estab | |
| Mollusks-Bivalves | Ruditapes philippinarum | 1974 | Definite | Estab | |
| Algae | Sargassum muticum | 1978 | Definite | Estab | |
| Annelids-Polychaetes | Streblospio benedicti | 1968 | Definite | Estab | |
| Tunicates | Styela canopus | 1868 | Definite | Estab | |
| Tunicates | Styela clava | 1971 | Definite | Estab | |
| Bryozoans | Tricellaria inopinata | 2010 | Definite | Estab | |
| Algae | Ulva australis | 1994 | Definite | Estab | |
| Algae | Undaria pinnatifida | 1983 | Definite | Estab | |
| Bryozoans | Victorella pavida | 1962 | Definite | Estab | |
| Bryozoans | Watersipora subatra* | 2005 | Definite | Estab | |