| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Adour | River (basin) | native | 40476 |
| Atlantic Ocean | Sea/Bay/Gulf | native | 3161 |
| Balearic Islands | Sea/Bay/Gulf | native | 95727 |
| Baltic Sea | Sea/Bay/Gulf | native | 36252 |
| Bay of Biscay river drainages and lakes | River (basin) | native | 59043 |
| British islands basins | River (basin) | native | 59043 |
| Celtic-Biscay Shelf | Sea/Bay/Gulf | native | 35388 |
| Danish islands basins | River (basin) | native | 59043 |
| Denmark river drainages and lakes | River (basin) | native | 59043 |
| Dordogne | River (basin) | native | 40476 |
| Elbe River | River (basin) | extirpated | 54732 |
| Garonne | River (basin) | native | 40476 |
| German Bight | Sea/Bay/Gulf | native | |
| Gotland basins | River (basin) | native | 59043 |
| Iberian Coastal | Sea/Bay/Gulf | native | 35388 |
| Iberian main basins | River (basin) | native | 59043 |
| Ireland river drainages and lakes | River (basin) | native | 59043 |
| Ladoga Lake | Lake | native | 89241 |
| Loire | River (basin) | native | 40476 |
| Mediterranean Sea | Sea/Bay/Gulf | native | 3161 |
| Neman (Niamunas) River | River (basin) | native | 59043 |
| Neva River (Ladoga Lake exclusive) | River (basin) | native | 26334 |
| North Sea | Sea/Bay/Gulf | native | 682 |
| Northern Atlanto-Baltic river drainages and lakes | River (basin) | native | 59043 |
| Oder | River (basin) | native | 59043 |
| Onega Lake | Lake | native | 89241 |
| Onega River | River (basin) | native | 59043 |
| Palearctic | Zoogeographic realm | endemic | 3161 |
| Rhine | River (basin) | native | 40476 |
| Rhône | River (basin) | native | |
| Sardinia Island | Sea/Bay/Gulf | native | 13729 |
| Seine | River (basin) | native | 40476 |
| Severn | River (basin) | native | 49557 |
| Southern Baltic Coastal river drainages and lakes | River (basin) | native | 59043 |
| Tyrrhenian Sea | Sea/Bay/Gulf | native | 95871 |
| Upper Danube | River (basin) | native | 59043 |
| Upper Prypiats | River (basin) | native | 59043 |
| Vistula | River (basin) | native | 59043 |
| Volga | River (basin) | native | 58030 |
| Weser | River (basin) | native | 59043 |
| Åland basins | River (basin) | native | 59043 |
| Öland basins | River (basin) | native | 59043 |