| Main Ref. | Spicer, J.I. and U. Janas, 2006 |
| To | Sweden |
| FAO area | Atlantic, Northeast |
| From | unknown |
| FAO area | |
| Year | |
| Range | 1940 - 1990 |
| Period | 1975-present |
| Established in the Wild | |
| Established in Aquaculture | |
| Significant Ecological Interactions | |
| Significant Socio-economic Effects | |
| Introduced by | |
| Reason | diffused from other countries |
| Other Reason | |
| Comments | It is believed to have diffused to the Swedish west coast in the 1940s from Danish coasts. By the 1990s, it was recorded in the Baltic coast of Sweden. |