| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Amudar'ya | River (basin) | native | 39701 |
| Aral Sea | Sea/Bay/Gulf | native | 556 |
| Atlantic Ocean | Sea/Bay/Gulf | native | 556 |
| Baltic Sea | Sea/Bay/Gulf | native | 36252 |
| Black Sea | Sea/Bay/Gulf | native | 26334 |
| Bug | River (basin) | native | 59043 |
| Caspian Sea | Lake | native | 26334 |
| Central Danube | River (basin) | native | 59043 |
| Central Dnieper | River (basin) | native | 59043 |
| Central Don | River (basin) | native | 59043 |
| Danube | River (basin) | native | 26334 |
| Danube Delta | River (basin) | native | 59043 |
| Dnester | River (basin) | native | 59043 |
| Don | River (basin) | native | 58293 |
| Eastern Black Sea | River (basin) | native | 59043 |
| Kuban River | River (basin) | native | 58296 |
| Kura | River (basin) | native | 26334 |
| Ladoga Lake | Lake | native | 59043 |
| Lower Danube | River (basin) | native | 59043 |
| Lower Dnieper | River (basin) | native | 59043 |
| Lower Prypiats | River (basin) | native | 59043 |
| Lower Volga | River (basin) | native | 59043 |
| Neman (Niamunas) River | River (basin) | native | 59043 |
| Neva River (Ladoga Lake exclusive) | River (basin) | native | 59043 |
| Northern Atlanto-Baltic river drainages and lakes | River (basin) | native | 59043 |
| Onega Lake | Lake | native | 59043 |
| Onega River | River (basin) | native | 59043 |
| Palearctic | Zoogeographic realm | endemic | 556 |
| Sea of Azov | Sea/Bay/Gulf | native | 26334 |
| Teterev | River (basin) | native | 59043 |
| Tisza | River (basin) | native | 59043 |
| Upper Danube | River (basin) | native | 59043 |
| Upper Dnieper | River (basin) | native | 59043 |
| Upper Don | River (basin) | native | 59043 |
| Upper Volga | River (basin) | native | 59043 |
| Ural | River (basin) | native | 26334 |
| Vistula | River (basin) | native | 59043 |
| Volga | River (basin) | native | 26334 |