| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Arctic Complex | River (basin) | native | 86838 |
| Atlantic Ocean | Sea/Bay/Gulf | native | 26334 |
| Baltic Sea | Sea/Bay/Gulf | introduced | 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 | 42845 |
| Danube Delta | River (basin) | native | 59043 |
| Desna | River (basin) | native | 59043 |
| Dnester | River (basin) | native | 59043 |
| Dnieper | River (basin) | native | 59042 |
| Dnieper-Bug Liman | River (basin) | native | 59043 |
| Don | River (basin) | native | 58293 |
| Don Delta | River (basin) | native | 59043 |
| Drava River | River (basin) | native | 59043 |
| Erqishi River | River (basin) | native | 41093 |
| Goryn | River (basin) | native | 59043 |
| Kama | River (basin) | native | 59043 |
| Kara Sea | Sea/Bay/Gulf | native | 124011 |
| Khoper | River (basin) | native | 59043 |
| Krinka | River (basin) | native | 59043 |
| Kuban River | River (basin) | extirpated | 59043 |
| Ladoga Lake | Lake | introduced | 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 |
| Medvedista | River (basin) | native | 59043 |
| Ob River | River (basin) | native | 59043 |
| Ob-Irtysh | River (basin) | native | 42845 |
| Onega River | River (basin) | native | 55804 |
| Palearctic | Zoogeographic realm | endemic | 26334 |
| Pechora | River (basin) | introduced | 59043 |
| Prut | River (basin) | native | 59043 |
| Psel | River (basin) | native | 59043 |
| Sal | River (basin) | native | 59043 |
| Sarata | River (basin) | native | 59043 |
| Sava River | River (basin) | native | 59043 |
| Sea of Azov | Sea/Bay/Gulf | native | 26334 |
| Sea of Azov river drainages and lakes | River (basin) | native | 59043 |
| Severskiy Donets | River (basin) | native | 59043 |
| Siret | River (basin) | native | 59043 |
| Small Don Central | River (basin) | native | 59043 |
| Southern Caspian Sea river drainages and lakes | River (basin) | native | 59043 |
| Syvash abo Gnyle more | River (basin) | native | 59043 |
| 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 Prypiats | River (basin) | native | 59043 |
| Upper Volga | River (basin) | native | 59043 |
| Ural | River (basin) | native | 59043 |
| Volga | River (basin) | native | 42845 |
| Yegorlyk-Manych | River (basin) | native | 59043 |
| Yenisei-Angara | River (basin) | native | 42845 |