| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Adour | River (basin) | native | 40476 |
| Arctic | Sea/Bay/Gulf | native | 120663 |
| Arctic Complex | River (basin) | native | 86838 |
| Atlantic Ocean | Sea/Bay/Gulf | native | 3161 |
| Balearic basins | River (basin) | native | 59043 |
| Balearic Islands | Sea/Bay/Gulf | native | 95727 |
| Balkan river drainages and lakes | River (basin) | native | 59043 |
| Baltic Sea | Sea/Bay/Gulf | native | 36252 |
| Barents Sea | Sea/Bay/Gulf | native | 59043 |
| Bay of Biscay river drainages and lakes | River (basin) | native | 59043 |
| Beaufort Sea | Sea/Bay/Gulf | native | 3161 |
| British islands basins | River (basin) | native | 59043 |
| Canadian Eastern Arctic - West Greenland | Sea/Bay/Gulf | native | 35388 |
| Celtic-Biscay Shelf | Sea/Bay/Gulf | native | 35388 |
| Central Arctic | Sea/Bay/Gulf | native | 3161 |
| Chesapeake Bay | Sea/Bay/Gulf | Native | 93252 |
| Corsica basins | River (basin) | native | 59043 |
| Corsica Island | Sea/Bay/Gulf | native | 96325 |
| Cote Azur | River (basin) | native | 59043 |
| Danish islands basins | River (basin) | native | 59043 |
| Denmark river drainages and lakes | River (basin) | native | 59043 |
| East Siberian Sea | Sea/Bay/Gulf | native | 26334 |
| Ebro | River (basin) | native | 59043 |
| Elbe River | River (basin) | native | 51031 |
| Faroe islands basins | River (basin) | native | 59043 |
| Faroe Plateau | Sea/Bay/Gulf | native | 34302 |
| Galician Shelf | Sea/Bay/Gulf | native | 57747 |
| Garonne | River (basin) | native | 40476 |
| German Bight | Sea/Bay/Gulf | native | |
| Gotland basins | River (basin) | native | 59043 |
| Great Lakes | Lake | native | 86798 |
| Gulf of Mexico | Sea/Bay/Gulf | stray | 5723 |
| Iberian Coastal | Sea/Bay/Gulf | native | 35388 |
| Iberian main basins | River (basin) | native | 59043 |
| 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 | 3161 |
| Italy main basins | River (basin) | native | 59043 |
| Labrador - Newfoundland | Sea/Bay/Gulf | native | 40643 |
| Lake Erie | Lake | introduced | 1998 |
| Lake Huron | Lake | introduced | 1998 |
| Lake Michigan | Lake | introduced | 1998 |
| Lake Ontario | Lake | native | 120883 |
| Lake St. Clair | Lake | introduced | 1998 |
| Lake Superior | Lake | introduced | 1998 |
| Laptev Sea | Sea/Bay/Gulf | native | 26334 |
| Loire | River (basin) | native | 30578 |
| Mediterranean Sea | Sea/Bay/Gulf | native | 34302 |
| Nearctic | Zoogeographic realm | native | 7251 |
| Neman (Niamunas) River | River (basin) | native | 59043 |
| North Sea | Sea/Bay/Gulf | native | 4645 |
| Northeast U.S. Continental Shelf | Sea/Bay/Gulf | native | 40643 |
| Northern Atlanto-Baltic river drainages and lakes | River (basin) | native | 59043 |
| Norwegian Sea | Sea/Bay/Gulf | native | 4645 |
| Oder | River (basin) | native | 59043 |
| Palearctic | Zoogeographic realm | native | 3161 |
| Po | River (basin) | native | 59043 |
| Rhine | River (basin) | native | 30578 |
| Rhône | River (basin) | native | 40476 |
| Sardinia basins | River (basin) | native | 59043 |
| Sardinia Island | Sea/Bay/Gulf | native | 13729 |
| Scotian Shelf | Sea/Bay/Gulf | native | 7251 |
| Seine | River (basin) | native | 59043 |
| Shetland islands basins | River (basin) | native | 59043 |
| Sicily basins | River (basin) | native | 59043 |
| Sicily Island | Sea/Bay/Gulf | native | 13729 |
| Southeast U.S. Continental Shelf | Sea/Bay/Gulf | native | 7251 |
| Southern Baltic Coastal river drainages and lakes | River (basin) | native | 59043 |
| St. Lawrence | River (basin) | native | 86798 |
| Tagus | River (basin) | native | 51031 |
| Ural | River (basin) | native | 26334 |
| Vistula | River (basin) | native | 59043 |
| Weser | River (basin) | native | 59043 |
| Åland basins | River (basin) | native | 59043 |
| Öland basins | River (basin) | native | 59043 |