| Species | Recipient region | Date of the first record | |
|---|
| Monocorophium sextonae | France / Celtic seas | 1936 |  |
| Monocorophium sextonae | Ireland | 1982 | |
| Monocorophium sextonae | United Kingdom (Britain) / English Channel | 1930 - 1939 | |
| Monocorophium sextonae | Netherlands | 1952 | |
| Monocorophium sextonae | Belgium | To 2000 | |
| Monocorophium sextonae | Germany / North Sea | 1997 | |
| Monocorophium sextonae | United Kingdom (Britain) / Celtic seas | 1930 | |
| Monocorophium sextonae | Norway / North Sea | 1985 | |
| Monocorophium sextonae | France / English Channel | 1936 | |
| Monocorophium sextonae | Spain / Iberian Coastal | To 2003 | |
| Monocorophium sextonae | United Kingdom (Britain) / North Sea | To 2005 | |
| Monocorophium sextonae | France / North Sea | 1976 | |
| Monocorophium sextonae | France / Biscay Gulf | 1936 | |
| Monocorophium sextonae | Australia / Bass strait | 1995 | |
