| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Aegean Sea | Sea/Bay/Gulf | introduced | 113897 |
| Atlantic Ocean | Sea/Bay/Gulf | native | 9953 |
| Baltic Sea | Sea/Bay/Gulf | introduced | 36252 |
| Black Sea | Sea/Bay/Gulf | native | 26334 |
| Caspian Sea | Lake | native | 42845 |
| Danube | River (basin) | native | 9953 |
| Dnester | River (basin) | native | 9953 |
| Dnieper | River (basin) | native | 9953 |
| Don | River (basin) | native | 9953 |
| Kuban River | River (basin) | native | 58296 |
| North Aegean | Sea/Bay/Gulf | introduced | 113897 |
| Palearctic | Zoogeographic realm | endemic | 9953 |
| Sea of Azov | Sea/Bay/Gulf | native | 26334 |
| Sea of Marmara | Sea/Bay/Gulf | native | 57855 |
| Volga | River (basin) | native | 58297 |