| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Adriatic Sea | Sea/Bay/Gulf | native | 124661 |
| Atlantic Ocean | Sea/Bay/Gulf | native | 4698 |
| Balkan river drainages and lakes | River (basin) | native | 59043 |
| Baltic Sea | Sea/Bay/Gulf | native | 36252 |
| Danish islands basins | River (basin) | native | 59043 |
| Danube | River (basin) | native | 55856 |
| Dnester | River (basin) | native | 59043 |
| Don | River (basin) | native | 58293 |
| Drava River | River (basin) | native | 59043 |
| Elbe River | River (basin) | native | 55856 |
| Iberian Coastal | Sea/Bay/Gulf | native | 27345 |
| Italy main basins | River (basin) | native | 59043 |
| Lake Peipus | Lake | native | 122793 |
| Lower Volga | River (basin) | native | 59043 |
| Neman (Niamunas) River | River (basin) | native | 59043 |
| Northern Atlanto-Baltic river drainages and lakes | River (basin) | native | 59043 |
| Norwegian Sea | Sea/Bay/Gulf | native | 683 |
| Onega River | River (basin) | native | 55804 |
| Palearctic | Zoogeographic realm | endemic | 4698 |
| Po | River (basin) | native | 59043 |
| Rhine | River (basin) | native | 55856 |
| Rhône | River (basin) | native | 55856 |
| Roia | River (basin) | native | 59043 |
| Tisza | River (basin) | native | 59043 |
| Upper Danube | River (basin) | native | 59043 |
| Upper Volga | River (basin) | native | 59043 |
| Volga | River (basin) | native | 58297 |
| Weser | River (basin) | native | 59043 |
| Zrmanja River | River (basin) | native | 59043 |
| Öland basins | River (basin) | native | 59043 |