| Main Ref. | Bartley, D.M. (comp./ed.), 2006 |
| To | United Kingdom |
| FAO area | Atlantic, Northeast |
| From | Northwest Atlantic |
| FAO area | |
| Year | |
| Range | 1880 - 1889 |
| Period | 19th century |
| Established in the Wild | yes, self reproducing |
| Established in Aquaculture | |
| Significant Ecological Interactions | yes - adverse |
| Significant Socio-economic Effects | |
| Introduced by | unknown |
| Reason | accidental |
| Other Reason | |
| Comments | Imported along Crassostrea virginica. |