| Bryozoans | Amathia verticillata | 2008 | Definite | Estab | |
| Crustaceans-Barnacles | Amphibalanus amphitrite | 1889 | Definite | Estab | |
| Crustaceans-Barnacles | Amphibalanus eburneus | 1998 | Definite | Estab | |
| Arthropoda-Insects | Anisolabis maritima | 1979 | Definite | Estab | |
| Algae | Antithamnion hubbsii* | 2019 | Definite | Estab | |
| Algae | Antithamnionella spirographidis* | None | Definite | Estab | |
| Algae | Asparagopsis armata* | 1928 | Definite | Estab | |
| Crustaceans-Barnacles | Balanus trigonus | 1887 | Definite | Estab | |
| Algae | Bonnemaisonia hamifera | 1989 | Definite | Estab | |
| Tunicates | Botrylloides violaceus | 2009 | Definite | Estab | |
| Tunicates | Botryllus schlosseri | 1971 | Definite | Estab | |
| Bryozoans | Bugula neritina | 2001 | Definite | Estab | |
| Bryozoans | Bugulina simplex | 1998 | Definite | Estab | |
| Bryozoans | Bugulina stolonifera | 1998 | Definite | Estab | |
| Crustaceans-Amphipods | Caprella scaura | 2013 | Definite | Estab | |
| Tunicates | Clavelina lepadiformis | 1971 | Definite | Estab | |
| Algae | Codium fragile ssp. Fragile | 1993 | Definite | Estab | |
| Cnidarians-Anthozoans | Diadumene lineata | 2011 | Definite | Estab | |
| Tunicates | Diplosoma listerianum | 1971 | Definite | Estab | |
| Cnidarians-Hydrozoans | Ectopleura crocea | 1989 | Definite | Estab | |
| Annelids-Polychaetes | Ficopomatus enigmaticus | 2016 | Definite | Estab | |
| Algae | Grateloupia turuturu | 2007 | Definite | Estab | |
| Crustaceans-Amphipods | Jassa marmorata | 1989 | Definite | Estab | |
| Crustaceans-Amphipods | Jassa marmorata | 2014 | Definite | Estab | |
| Crustaceans-Isopods | Ligia oceanica | 1998 | Definite | Estab | |
| Crustaceans-Isopods | Limnoria quadripunctata | 2011 | Definite | Estab | |
| Tunicates | Microcosmus squamiger | 2009 | Definite | Estab | |
| Mollusks-Bivalves | Ostrea edulis | 2013 | Definite | Estab | |
| Crustaceans-Isopods | Paracerceis sculpta | 2014 | Definite | Estab | |
| Tunicates | Styela plicata | 2010 | Definite | Estab | |
| Arthropoda-Insects | Telmatogeton japonicus* | None | Definite | Estab | |
| Bryozoans | Tricellaria inopinata | 2015 | Definite | Estab | |
| Mollusks-Gastropods | Truncatella subcylindrica | 1980 | Definite | Estab | |
| Bryozoans | Watersipora subtorquata | 1888 | Definite | Estab | |