| Main Ref. | Spicer, J.I. and U. Janas, 2006 |
| To | Denmark |
| FAO area | Atlantic, Northeast |
| From | unknown |
| FAO area | |
| Year | 1860 |
| Range | |
| Period | 19th century |
| Established in the Wild | |
| Established in Aquaculture | |
| Significant Ecological Interactions | |
| Significant Socio-economic Effects | |
| Introduced by | |
| Reason | unknown |
| Other Reason | |
| Comments | It is believed to arrive in NW Europe first on Danish coasts in the 1860s. |