| Main Ref. | Hill, M., R. Baker, G. Broad, P.J. Chandler, G.H. Coop, J. Ellis, D. Jones, C. Hoyland, I. Laing, M. Longshaw, N. Moore, D. Parrott, D. Pearman, C. Preston, R.M. Smith and R. Waters, 2005 |
| To | Orwell Estuary, southern North Sea |
| FAO area | Atlantic, Northeast |
| From | Unspecified, Japan. |
| FAO area | Pacific, Northwest |
| Year | 2000 |
| Range | |
| Period | 1975-present |
| Established in the Wild | probably yes |
| Established in Aquaculture | |
| Significant Ecological Interactions | Unknown |
| Significant Socio-economic Effects | |
| Introduced by | |
| Reason | accidental |
| Other Reason | |
| Comments | Possibly accidentally transported. Persists in the wild but is unable to reproduce effectively. Ref. Hill, M., R. Baker, G. Broad, P.J. Chandler, G.H. Coop, J. Ellis, D. Jones, C. Hoyland, I. Laing, M. Longshaw, N. Moore, D. Parrott, D. Pearman, C. Preston, R.M. Smith and R. Waters, 2005 |