| Country | Locality | Introduced | Year | Qualitative Value | Ref. |
|---|---|---|---|---|---|
| Greenland | off Greenland | 1982 - 1996 | rare | 80685 | |
| Norway | western Barents Sea | 2000 - 2000 | very common | 80858 | |
| Russian Federation | Barents Sea | 1998 - 2006 | common | 80862 | |
| 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 | absent | 80786 | |
| England and Wales (UK) | R3 - between North Foreland & Portland Bill | 1973 - 1995 | absent | 80786 | |
| United States (contiguous states) | Penobscot Bay, Maine | 1997 - 1997 | absent | 39299 | |
| United States (contiguous states) | Penobscot Bay, Maine | 1998 - 1998 | rare | 39299 |