| Main Ref. | Bartley, D.M. (comp./ed.), 2006 |
| To | France |
| FAO area | |
| From | United Kingdom |
| FAO area | |
| Year | 1949 |
| Range | |
| Period | 1925-1949 |
| Established in the Wild | yes, self reproducing |
| Established in Aquaculture | |
| Significant Ecological Interactions | yes - adverse |
| Significant Socio-economic Effects | |
| Introduced by | unknown |
| Reason | accidental with ships |
| Other Reason | |
| Comments | Probably imported during Allied shipping operations, from Great Britain or directly from the USA. |