| Taxonomic Group | Name | Year | Invasion Status | Population Status | Vectors |
|---|---|---|---|---|---|
| Algae | Grateloupia turuturu | 2009 | Definite | Established | None |
| Algae | Pachymeniopsis lanceolata* | 2011 | Definite | Established | Hull Fouling |
| Algae | Sargassum horneri | 2010 | Definite | Established | Hull Fouling, Natural Dispersal |
| Algae | Sargassum muticum | 1977 | Definite | Established | Hull Fouling, Natural Dispersal |
| Algae | Schizymenia dubyi* | 1957 | Definite | Established | Ballast Water, Hull Fouling |
| Algae | Undaria pinnatifida | 2001 | Definite | Established | Fisheries Accidental (not Oyster), Natural Dispersal |
| Annelids-Polychaetes | Ficopomatus enigmaticus | 2008 | Definite | Established | None |
| Annelids-Polychaetes | Megasyllis nipponica | 2011 | Definite | Established | Fisheries Accidental (not Oyster), Hull Fouling, Natural Dispersal |
| Annelids-Polychaetes | Parasabella fullo | 2011 | Definite | Established | Hull Fouling |
| Annelids-Polychaetes | Polydora cornuta | 1971 | Definite | Established | Hull Fouling |
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