| Taxonomic Group | Name | Year | |
|---|---|---|---|
| Cnidarians-Anthozoans | Actinia equina* | 2022 | |
| Algae | Bonnemaisonia hamifera | 2004 | |
| Crustaceans-Crabs | Carcinus maenas | 1973 | |
| Algae | Codium fragile ssp. Fragile | 1966 | |
| Cnidarians-Anthozoans | Diadumene lineata | 1938 | |
| Annelids-Polychaetes | Ficopomatus enigmaticus | 1976 | |
| Crustaceans-Crabs | Hemigrapsus sanguineus | 1992 | |
| Crustaceans-Isopods | Ianiropsis serricaudis | 2012 | |
| Mollusks-Gastropods | Littorina littorea | 1894 | |
| Algae | Lomentaria orcadensis* | 1969 | |
| Crustaceans-Amphipods | Microdeutopus gryllotalpa | 1968 | |
| Cnidarians-Hydrozoans | Moerisia lyonsi | 2014 | |
| Protozoans | Perkinsus marinus* | 1991 | |
| Arthropoda-Insects | Telmatogeton japonicus* | 1974 | |
| Mollusks-Bivalves | Teredo navalis | 1921 |