| Main Ref. | AquaNIS, 2012 |
| To | Gat van Ouwerkerk |
| FAO area | Atlantic, Northeast |
| From | unknown |
| FAO area | |
| Year | 1964 |
| Range | |
| Period | 1950-1974 |
| Established in the Wild | |
| Established in Aquaculture | |
| Significant Ecological Interactions | |
| Significant Socio-economic Effects | |
| Introduced by | |
| Reason | diffused from other countries |
| Other Reason | |
| Comments | It was first observed in Gat van Ouwerkerk near the Oosterchelde estuary in 1964 but has not been fouhd there again. It has been observed in the Goesse Meer in 2000 and 2001, and in the Westkapelse Kreek in 2001. |