| Species | Recipient region | Date of the first record | |
|---|
| Styela clava | France / Western Mediterranean | 2004 |  |
| Styela clava | Ireland | To 1971 | |
| Styela clava | United Kingdom (Britain) / Celtic seas | 1953 | |
| Styela clava | France / Celtic seas | 1968 | |
| Styela clava | United Kingdom (Britain) / English Channel | 1953 | |
| Styela clava | Sweden / North Sea | To 2023 | |
| Styela clava | Netherlands | 1974 | |
| Styela clava | Belgium | To 1986 | |
| Styela clava | Denmark / North Sea | 1981 | |
| Styela clava | Germany / North Sea | 1997 | |
| Styela clava | Romania | 2002 | |
| Styela clava | France / Biscay Gulf | 1979 | |
| Styela clava | France / English Channel | 1968 | |
| Styela clava | Italy / Adriatic Sea | 2021 | |
| Styela clava | Spain / Iberian Coastal | To 2005 | |
| Styela clava | Portugal / Iberian Coastal | To 2003 | |
| Styela clava | United Kingdom (Britain) / North Sea | To 1998 | |
| Styela clava | Canada / Southern Gulf of St. Lawrence and Eastern Scotian Shelf | 1998 | |
| Styela clava | Canada / South-eastern Scotian Shelf | 2012 | |
| Styela clava | Norway / North Sea | To 2011 | |
| Styela clava | Germany / Baltic Sea | 2017 | |
| Styela clava | France / North Sea | 1970 | |
| Styela clava | Denmark / Baltic Sea | 1981 | |
| Styela clava | Australia / Bass strait | 1976 | |
| Styela clava | United Kingdom (Britain) / North Sea / Orkney Islands | 2020 | |
