| Country | Locality | Introduced | Year | Qualitative Value | Ref. |
|---|---|---|---|---|---|
| England and Wales (UK) | R1 - between Flamborough Head and Winterton | 1973 - 1995 | rare | 80786 | |
| England and Wales (UK) | R2 - east coast between Winterton & North Foreland | 1973 - 1995 | common | 80786 | |
| England and Wales (UK) | R3 - between North Foreland & Portland Bill | 1973 - 1995 | common | 80786 | |
| Germany (Federal Republic of) | Western Baltic Sea (ICES Subdivision 22 and 24) | 2000 - 2000 | very common | 82151 | |
| Germany (Federal Republic of) | Western Baltic Sea (ICES Subdivision 22 and 24) | 2001 - 2001 | very common | 82151 | |
| Germany (Federal Republic of) | Western Baltic Sea (ICES Subdivision 22 and 24) | 2002 - 2002 | abundant | 82151 |