| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Atlantic Ocean | Sea/Bay/Gulf | native | 4779 |
| Baltic Sea | Sea/Bay/Gulf | native | 36252 |
| Barents Sea | Sea/Bay/Gulf | native | 26334 |
| Barents Sea Islands basins | River (basin) | native | 59043 |
| Barents Sea river drainages and lakes | River (basin) | native | 59043 |
| Danish islands basins | River (basin) | native | 59043 |
| Denmark river drainages and lakes | River (basin) | native | 59043 |
| Dwina | River (basin) | native | 59043 |
| Elbe River | River (basin) | native | 59043 |
| Lake Baikal | Lake | questionable | 58294 |
| Lake Peipus | Lake | native | 122793 |
| 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 |
| Oder | River (basin) | native | 59043 |
| Onega Lake | Lake | native | 59043 |
| Onega River | River (basin) | native | 55804 |
| Palearctic | Zoogeographic realm | endemic | 4779 |
| Pechora | River (basin) | native | 59043 |
| Rhine | River (basin) | extirpated | 59043 |
| Southern Baltic Coastal river drainages and lakes | River (basin) | native | 59043 |
| Upper Dnieper | River (basin) | native | 59043 |
| Upper Prypiats | River (basin) | native | 59043 |
| Upper Volga | River (basin) | native | 59043 |
| Vistula | River (basin) | native | 59043 |
| Volga | River (basin) | native | 26334 |
| Åland basins | River (basin) | native | 59043 |