| Species | Recipient region | Date of the first record | |
|---|
| Caprella mutica | Ireland | 2003 |  |
| Caprella mutica | United Kingdom (Britain) / Celtic seas | 2000 | |
| Caprella mutica | United Kingdom (Britain) / English Channel | 2000 | |
| Caprella mutica | Netherlands | 1993 | |
| Caprella mutica | Denmark / North Sea | 2005 | |
| Caprella mutica | Belgium | 1998 | |
| Caprella mutica | Germany / North Sea | 2004 | |
| Caprella mutica | Norway / North Sea | 1999 | |
| Caprella mutica | Canada / Northern Newfoundland | 2012 | |
| Caprella mutica | Canada / Northern Gulf of St. Lawrence | 2016 | |
| Caprella mutica | Canada / Southern Newfoundland and Southern Grand Banks | 2010 | |
| Caprella mutica | Canada / Southern Gulf of St. Lawrence and Eastern Scotian Shelf | 1998 | |
| Caprella mutica | Canada / South-eastern Scotian Shelf | 2003 | |
| Caprella mutica | Canada / Bay of Fundy | 2002 | |
| Caprella mutica | France / Biscay Gulf | 2004 | |
| Caprella mutica | United Kingdom (Britain) / North Sea | 2002 | |
| Caprella mutica | Spain / Iberian Coastal | 2012 - 2013 | |
| Caprella mutica | Sweden / North Sea | 2011 | |
| Caprella mutica | Norway / Norwegian Sea | To 2012 | |
| Caprella mutica | France / North Sea | 2004 | |
| Caprella mutica | United Kingdom (Britain) / North Sea / Orkney Islands | To 2006 | |
| Caprella mutica | Denmark / Baltic Sea | 2017 | |
