| Reference no. | Berg, L.S., 1964 |
| Ecosystem | Caspian Sea |
| Status | native |
| Abundance | scarce (very unlikely) |
| Lifestage | adults |
| Regional database | |
| Remarks | Very rare; decline will most likely continue due to expanding hydroelectric development, overfishing in estuaries and strong ecological impacts (Ref. 59043). |