| Reference no. | Gessner, J., P. Williot, E. Rochard, J. Freyhof and M. Kottelat, 2022 |
| Ecosystem | Baltic Sea |
| Status | extirpated |
| Abundance | occasional (usually not seen) |
| Lifestage | adults |
| Regional database | |
| Remarks | Threatened due to target and bycatch fisheries, construction/weirs in rivers, and habitat loss (Ref. 83294). Also Ref. 6114, 42845, 51439, 82476. HELCOM's status of threat: regionally extinct (Ref. 83294). |