| Main Ref. | Bartley, D.M. (comp./ed.), 2006 |
| To | United Kingdom |
| FAO area | Atlantic, Northeast |
| From | Sweden and USA |
| FAO area | |
| Year | 1976 |
| Range | |
| Period | 1975-present |
| Established in the Wild | yes, self reproducing |
| Established in Aquaculture | widely used |
| Significant Ecological Interactions | yes - adverse |
| Significant Socio-economic Effects | |
| Introduced by | unknown |
| Reason | accidental |
| Other Reason | forage |
| Comments | Other information from P.S. Maitland. 1996. Aq. Cons.:Marine and Freshwater Ecosystems 6:107-110. |