| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Albegna | River (basin) | introduced | 45688 |
| Atlantic Ocean | Sea/Bay/Gulf | native | 556 |
| Australian | Zoogeographic realm | introduced | 7300 |
| Balearic basins | River (basin) | native | 59043 |
| Balkan river drainages and lakes | River (basin) | native | 59043 |
| Baltic Sea | Sea/Bay/Gulf | native | 36252 |
| Barents Sea river drainages and lakes | River (basin) | native | 59043 |
| Bay of Biscay river drainages and lakes | River (basin) | native | 59043 |
| Black Sea | Sea/Bay/Gulf | native | 26334 |
| Bosten Lake | Lake | native | 41093 |
| British islands basins | River (basin) | native | 59043 |
| 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 |
| Central Turkey river drainages and lakes | River (basin) | native | 59043 |
| Corsica basins | River (basin) | native | 59043 |
| Cote Azur | River (basin) | native | 59043 |
| Danish islands basins | River (basin) | native | 59043 |
| Danube Delta | River (basin) | native | 59043 |
| Denmark river drainages and lakes | River (basin) | native | 59043 |
| Desna | River (basin) | native | 59043 |
| Dnester | River (basin) | native | 59043 |
| Dnieper-Bug Liman | River (basin) | native | 59043 |
| Don | River (basin) | native | 58293 |
| Don Delta | River (basin) | native | 59043 |
| Douro | River (basin) | native | 59043 |
| Drava River | River (basin) | native | 59043 |
| Dwina | 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 |
| Ebro | River (basin) | native | 59043 |
| Elbe River | River (basin) | native | 54732 |
| Erqishi River | River (basin) | native | 41093 |
| Ethiopian | Zoogeographic realm | introduced | 1739 |
| Fiora | River (basin) | introduced | 45688 |
| Goryn | River (basin) | native | 59043 |
| Gotland basins | River (basin) | native | 59043 |
| Iberian Coastal | Sea/Bay/Gulf | native | 683 |
| Iberian main basins | River (basin) | native | 59043 |
| Issyk-Kul Lake | Lake | introduced | 41059 |
| Italy main basins | River (basin) | native | 59043 |
| Kama | River (basin) | native | 59043 |
| Khoper | River (basin) | native | 59043 |
| Krinka | River (basin) | native | 59043 |
| Kuban River | River (basin) | native | 58296 |
| Lake Baikal | Lake | native | 26334 |
| Loire | River (basin) | native | 2196 |
| 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 |
| Nearctic | Zoogeographic realm | introduced | 3814 |
| Neman (Niamunas) River | River (basin) | native | 59043 |
| Neotropical | Zoogeographic realm | introduced | 556 |
| Northern Atlanto-Baltic river drainages and lakes | River (basin) | native | 59043 |
| Northern Caspian Sea river drainages and lakes | River (basin) | native | 59043 |
| Norwegian Sea | Sea/Bay/Gulf | native | 1739 |
| Ob-Irtysh | River (basin) | native | 26334 |
| Oder | River (basin) | native | 59043 |
| Ombrone | River (basin) | introduced | 45688 |
| Onega River | River (basin) | native | 59043 |
| Oriental | Zoogeographic realm | introduced | 1739 |
| Palearctic | Zoogeographic realm | endemic | 556 |
| Pechora | River (basin) | native | 59043 |
| Po | River (basin) | native | 59043 |
| Prespa | Lake | native | 75668 |
| Prut | River (basin) | native | 59043 |
| Psel | River (basin) | native | 59043 |
| Rhine | River (basin) | native | 59043 |
| Rhône | River (basin) | native | 59043 |
| Sal | River (basin) | native | 59043 |
| Sarata | River (basin) | native | 59043 |
| Sardinia basins | River (basin) | native | 59043 |
| Sava River | River (basin) | native | 59043 |
| Sea of Azov river drainages and lakes | River (basin) | native | 59043 |
| Seine | River (basin) | native | 59043 |
| Severskiy Donets | River (basin) | native | 59043 |
| Sicily basins | River (basin) | native | 59043 |
| Siret | River (basin) | native | 59043 |
| Small Don Central | River (basin) | native | 59043 |
| Southern Baltic Coastal river drainages and lakes | River (basin) | native | 59043 |
| Southern Caspian Sea river drainages and lakes | River (basin) | native | 59043 |
| Syvash abo Gnyle more | River (basin) | native | 59043 |
| Tarim | River (basin) | native | 41093 |
| 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 | 26334 |
| Vistula | River (basin) | native | 59043 |
| Volga | River (basin) | native | 58297 |
| Weser | River (basin) | native | 59043 |
| Western Caspian Sea river drainages and lakes | River (basin) | native | 59043 |
| Yegorlyk-Manych | River (basin) | native | 59043 |
| Yenice Irmagi | River (basin) | native | 59043 |
| Yenisei-Angara | River (basin) | native | 26334 |
| Yili River | River (basin) | native | 41093 |
| Åland basins | River (basin) | native | 59043 |
| Öland basins | River (basin) | native | 59043 |