| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Albegna | River (basin) | native | 45688 |
| Amudar'ya | River (basin) | native | 39701 |
| Aral Sea | Sea/Bay/Gulf | native | 26334 |
| Atlantic Ocean | Sea/Bay/Gulf | introduced | 6390 |
| Australian | Zoogeographic realm | introduced | 6390 |
| Balearic Islands | Sea/Bay/Gulf | native | 95727 |
| 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 |
| Bay of Biscay river drainages and lakes | River (basin) | native | 59043 |
| Black Sea | Sea/Bay/Gulf | native | 26334 |
| British islands basins | River (basin) | native | 59043 |
| Bruna | River (basin) | native | 45688 |
| Caspian Sea | Lake | native | 26334 |
| Celtic-Biscay Shelf | Sea/Bay/Gulf | native | 35388 |
| Corsica basins | River (basin) | introduced | 94543 |
| Danish islands basins | River (basin) | native | 59043 |
| Danube | River (basin) | introduced | 89684 |
| Denmark river drainages and lakes | River (basin) | native | 59043 |
| Desna | River (basin) | native | 59043 |
| Douro | River (basin) | native | 59043 |
| Drava River | River (basin) | native | 59043 |
| Dwina | River (basin) | native | 59043 |
| Elbe River | River (basin) | extirpated | 54732 |
| Ethiopian | Zoogeographic realm | introduced | 27123 |
| Faroe islands basins | River (basin) | native | 59043 |
| Faroe Plateau | Sea/Bay/Gulf | native | 35388 |
| Fiora | River (basin) | native | 45688 |
| German Bight | Sea/Bay/Gulf | native | |
| Goryn | River (basin) | native | 59043 |
| Gotland basins | River (basin) | native | 59043 |
| Great Lakes | Lake | introduced | 50315 |
| Iberian Coastal | Sea/Bay/Gulf | native | 35388 |
| Iceland river drainages and lakes | River (basin) | native | 59043 |
| Iceland Shelf and Sea | Sea/Bay/Gulf | native | 35388 |
| Ireland river drainages and lakes | River (basin) | native | 59043 |
| Irish Sea | Sea/Bay/Gulf | native | 9488 |
| Kama | River (basin) | native | 59043 |
| Kuban River | River (basin) | native | 58296 |
| Kura | River (basin) | native | 41168 |
| Labrador - Newfoundland | Sea/Bay/Gulf | introduced | 37032 |
| Lake Erie | Lake | introduced | 120332 |
| Lake Huron | Lake | introduced | 120332 |
| Lake Ontario | Lake | introduced | 120332 |
| Lake Peipus | Lake | native | 122793 |
| Lake St. Clair | Lake | introduced | 120332 |
| Lake Superior | Lake | introduced | 120332 |
| Loire | River (basin) | native | 59043 |
| Lower Prypiats | River (basin) | native | 59043 |
| Mediterranean Sea | Sea/Bay/Gulf | native | 27118 |
| Murray-Darling | River (basin) | introduced | 75154 |
| Nearctic | Zoogeographic realm | introduced | 6885 |
| Neman (Niamunas) River | River (basin) | native | 59043 |
| Neotropical | Zoogeographic realm | introduced | 6390 |
| North Sea | Sea/Bay/Gulf | native | 173 |
| Northeast U.S. Continental Shelf | Sea/Bay/Gulf | introduced | 1739 |
| Northern Atlanto-Baltic river drainages and lakes | River (basin) | native | 59043 |
| Norwegian Sea | Sea/Bay/Gulf | native | 173 |
| Oder | River (basin) | native | 59043 |
| Ombrone | River (basin) | native | 45688 |
| Onega River | River (basin) | native | 59043 |
| Oriental | Zoogeographic realm | introduced | 1739 |
| Pacific Ocean | Sea/Bay/Gulf | introduced | 1739 |
| Palearctic | Zoogeographic realm | endemic | 6390 |
| Pechora | River (basin) | native | 59043 |
| Rhine | River (basin) | native | 59043 |
| Rhône | River (basin) | native | 59043 |
| Sabaki | River (basin) | introduced | 30558 |
| Salish Sea | Sea/Bay/Gulf | questionable | 11382 |
| Sardinia Island | Sea/Bay/Gulf | native | 13729 |
| Scotian Shelf | Sea/Bay/Gulf | native | 37032 |
| Seine | River (basin) | native | 59043 |
| Shetland islands basins | River (basin) | native | 59043 |
| Sicily Island | Sea/Bay/Gulf | native | 13729 |
| Southern Baltic Coastal river drainages and lakes | River (basin) | native | 59043 |
| Tana | River (basin) | introduced | 32384 |
| Tigris | River (basin) | introduced | 39702 |
| Tisza | River (basin) | native | 59043 |
| Upper Danube | 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 | 58297 |
| Weser | River (basin) | native | 59043 |
| Åland basins | River (basin) | native | 59043 |
| Öland basins | River (basin) | native | 59043 |