| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Aral Sea | Sea/Bay/Gulf | introduced | 26334 |
| Balkan river drainages and lakes | River (basin) | native | 59043 |
| Balkanabat basin | River (basin) | native | 59043 |
| Black Sea | Sea/Bay/Gulf | native | 4696 |
| Bug | River (basin) | native | 59043 |
| Caspian Sea | Lake | native | 4696 |
| Central Don | River (basin) | native | 59043 |
| Crimean Peninsula | River (basin) | native | 59043 |
| Danube Delta | River (basin) | native | 59043 |
| Dnester | River (basin) | native | 59043 |
| Dnieper-Bug Liman | River (basin) | native | 59043 |
| Don Delta | River (basin) | native | 59043 |
| Eastern Black Sea | River (basin) | native | 59043 |
| Eastern Caspian Sea river drainages and lakes | River (basin) | native | 59043 |
| Eastern Mediterranean river drainages and lakes | River (basin) | native | 59043 |
| Khoper | River (basin) | native | 59043 |
| Krinka | River (basin) | native | 59043 |
| Kuban River | River (basin) | native | 58296 |
| Kura | River (basin) | native | 26334 |
| Lower Danube | River (basin) | native | 59043 |
| Lower Dnieper | River (basin) | native | 59043 |
| Lower Volga | River (basin) | native | 59043 |
| Mediterranean Sea | Sea/Bay/Gulf | native | 12215 |
| Medvedista | River (basin) | native | 59043 |
| Northern Caspian Sea river drainages and lakes | River (basin) | native | 59043 |
| Palearctic | Zoogeographic realm | endemic | 4696 |
| Prut | River (basin) | native | 59043 |
| Sal | River (basin) | native | 59043 |
| Sarata | River (basin) | native | 59043 |
| Sea of Azov | Sea/Bay/Gulf | native | 4696 |
| Sea of Azov river drainages and lakes | River (basin) | native | 59043 |
| Sea of Marmara | Sea/Bay/Gulf | native | 57855 |
| Severskiy Donets | River (basin) | native | 59043 |
| Some? | River (basin) | native | 96238 |
| Southern Caspian Sea river drainages and lakes | River (basin) | native | 59043 |
| Syvash abo Gnyle more | River (basin) | native | 59043 |
| Ural | River (basin) | native | 59043 |
| Volga | River (basin) | native | 26334 |
| Western Caspian Sea river drainages and lakes | River (basin) | native | 59043 |
| Yenice Irmagi | River (basin) | native | 59043 |