| Species | Recipient region | Date of the first record | |
|---|
| Bugula neritina | Ireland | To 2006 |  |
| Bugula neritina | United Kingdom (Britain) / Celtic seas | To 1912 | |
| Bugula neritina | United Kingdom (Britain) / English Channel | To 1912 | |
| Bugula neritina | Belgium | 1999 | |
| Bugula neritina | Spain / Canary Islands | To 2003 | |
| Bugula neritina | Spain / Iberian Coastal | 2003 | |
| Bugula neritina | Germany / North Sea | 2010 | |
| Bugula neritina | Netherlands | 2007 | |
| Bugula neritina | France / Biscay Gulf | 2001 | |
| Bugula neritina | France / Celtic seas | 1966 | |
| Bugula neritina | France / English Channel | 2002 | |
| Bugula neritina | Portugal / Iberian Coastal | 2004 | |
| Bugula neritina | Portugal / Azores | 2001 | |
| Bugula neritina | Portugal / Madeira | To 2012 | |
| Bugula neritina | France / Western Mediterranean | 1900 | |
| Bugula neritina | France / North Sea | 1973 | |
| Bugula neritina | Spain / Western Mediterranean | 2018 | |
| Bugula neritina | Australia / Bass strait | 1881 | |
