| Reference no. | Winkler, H.M., K. Skora, R. Repecka, M. Ploks, A. Neelov, L. Urho, A. Gushin and H. Jespersen, 2000 |
| Ecosystem | Baltic Sea |
| Status | native |
| Abundance | scarce (very unlikely) |
| Lifestage | adults |
| Regional database | |
| Remarks | Threat: eutrophication/pollution (Ref. 83294). HELCOM: critically endangered; least concern (Skagerrak and Kattegat); considered a high priority species (Ref. 83294). Also Ref. 6114, 35388. |