| Country | Locality | Introduced | Year | Qualitative Value | Ref. |
|---|---|---|---|---|---|
| Portugal | Matosinhos fishing port | 2001 - 2001 | rare | 82320 | |
| Portugal | Peniche fishing port | 2001 - 2001 | common | 82320 | |
| England and Wales (UK) | R1 - between Flamborough Head and Winterton | 1973 - 1995 | absent | 80786 | |
| England and Wales (UK) | R2 - east coast between Winterton & North Foreland | 1973 - 1995 | rare | 80786 | |
| England and Wales (UK) | R3 - between North Foreland & Portland Bill | 1973 - 1995 | rare | 80786 |