| Species | Recipient region | Date of the first record | |
|---|
| Didemnum vexillum | Norway / North Sea | 2020 |  |
| Didemnum vexillum | Ireland | 2005 | |
| Didemnum vexillum | United Kingdom (Britain) / Celtic seas | 2005 | |
| Didemnum vexillum | United Kingdom (Britain) / English Channel | 2005 | |
| Didemnum vexillum | Germany / North Sea | 2016 | |
| Didemnum vexillum | Netherlands | To 1991 | |
| Didemnum vexillum | Canada / Bay of Fundy | 2013 | |
| Didemnum vexillum | France / North Sea | To 2001 | |
| Didemnum vexillum | Spain / Iberian Coastal | 2017 | |
| Didemnum vexillum | Italy / Adriatic Sea | To 2007 | |
| Didemnum vexillum | France / English Channel | 1998 | |
| Didemnum vexillum | Portugal / Iberian Coastal | 2020 | |
| Didemnum vexillum | Sweden / North Sea | 2022 | |
