| Crustaceans-Barnacles | Amphibalanus amphitrite | 1999 | Definite | Estab | |
| Algae | Asparagopsis armata* | None | Definite | Estab | |
| Tunicates | Botrylloides giganteus | 2011 | Definite | Estab | |
| Tunicates | Botryllus schlosseri | 1948 | Definite | Estab | |
| Bryozoans | Bugula neritina | 1982 | Definite | Estab | |
| Bryozoans | Bugulina flabellata | 1950 | Definite | Estab | |
| Tunicates | Ciona robusta | 2002 | Definite | Estab | |
| Algae | Codium fragile ssp. Fragile | 1998 | Definite | Estab | |
| Cnidarians-Anthozoans | Diadumene lineata | 2012 | Definite | Estab | |
| Crustaceans-Isopods | Halophiloscia couchii* | None | Definite | Estab | |
| Algae | Mazzaella japonica* | 1950 | Definite | Estab | |
| Algae | Melanothamnus japonicus* | 2017 | Definite | Estab | |
| Tunicates | Molgula ficus | 1997 | Definite | Estab | |
| Crustaceans-Amphipods | Monocorophium acherusicum | 2015 | Definite | Estab | |
| Crustaceans-Amphipods | Monocorophium insidiosum | 2015 | Definite | Estab | |
| Mollusks-Gastropods | Myosotella myosotis | 1837 | Definite | Estab | |
| Crustaceans-Isopods | Niambia capensis | 2016 | Definite | Estab | |
| Crustaceans-Amphipods | Orchestia gammarellus | 2005 | Definite | Estab | |
| Crustaceans-Amphipods | Paracaprella pusilla | 2001 | Definite | Estab | |
| Annelids-Polychaetes | Polydora hoplura | 2002 | Definite | Estab | |
| Crustaceans-Amphipods | Stenothoe valida | 2015 | Definite | Estab | |
| Arthropoda-Insects | Thambemyia borealis* | 2006 | Definite | Estab | |
| Algae | Ulva australis | 2013 | Definite | Estab | |