| Referência no. | Winkler, H.M., K. Skora, R. Repecka, M. Ploks, A. Neelov, L. Urho, A. Gushin and H. Jespersen, 2000 |
| Ecossistema | Baltic Sea |
| Estado | native |
| Abundância | common (usually seen) |
| Fase de vida | juv./adults |
| Base de dados regional | |
| Notas | Reported only from the Neva, Narova and Luga rivers. Land-locked forms known from Lakes Ladoga and Onega (Ref. 26334). HELCOM: endangered in southwestern Baltic; near threatened in northern Baltic; considered a high priority species (Ref. 83294). |