| Main Ref. | Bartley, D.M. (comp./ed.), 2006 |
| To | Belgium |
| FAO area | Atlantic, Northeast |
| From | unknown |
| FAO area | |
| Year | |
| Range | 1990 - 1999 |
| Period | 1975-present |
| Established in the Wild | yes, self reproducing |
| Established in Aquaculture | |
| Significant Ecological Interactions | probably no |
| Significant Socio-economic Effects | |
| Introduced by | unknown |
| Reason | accidental |
| Other Reason | |
| Comments | The settlement of a wild population of C. gigas is suggesting to restore oyster cultivation, a practice that was common in the area before the deterioration of the water quality. |