| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Atlantic Complex | River (basin) | native | 81264 |
| Atlantic Ocean | Sea/Bay/Gulf | native | 5723 |
| 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 | 117998 |
| 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 |
| Beaufort Sea | Sea/Bay/Gulf | native | 5723 |
| 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 | 5723 |
| Danish islands basins | River (basin) | native | 59043 |
| Denmark river drainages and lakes | River (basin) | native | 59043 |
| Dordogne | River (basin) | native | 51442 |
| Douro | River (basin) | extirpated | 59043 |
| Dwina | River (basin) | native | 59043 |
| East Bering Sea | Sea/Bay/Gulf | native | 96339 |
| East Central Australian Shelf | Sea/Bay/Gulf | introduced | 6390 |
| Elbe River | River (basin) | extirpated | 54732 |
| Faroe islands basins | River (basin) | native | 59043 |
| Faroe Plateau | Sea/Bay/Gulf | native | 35388 |
| Garonne | River (basin) | native | 51442 |
| German Bight | Sea/Bay/Gulf | native | |
| Gotland basins | River (basin) | native | 59043 |
| Great Lakes | Lake | introduced | 50315 |
| Greenland Sea | Sea/Bay/Gulf | native | 35388 |
| Guadiana | River (basin) | extirpated | 59043 |
| Gulf of Alaska | Sea/Bay/Gulf | native | 95143 |
| Gulf of Maine | Sea/Bay/Gulf | native | 37512 |
| Humboldt Current | Sea/Bay/Gulf | introduced | 1739 |
| Iberian Coastal | Sea/Bay/Gulf | native | 37032 |
| 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 | 4779 |
| Johnstone Strait | Sea/Bay/Gulf | native | 95143 |
| Juan de Fuca Strait | Sea/Bay/Gulf | not established | 11980 |
| Kara River | River (basin) | native | 59043 |
| Kara Sea | Sea/Bay/Gulf | native | 124011 |
| Labrador - Newfoundland | Sea/Bay/Gulf | native | 35388 |
| Ladoga Lake | Lake | native | 59043 |
| Lake Ontario | Lake | extirpated | 86798 |
| Loire | River (basin) | native | 2196 |
| Mediterranean Sea | Sea/Bay/Gulf | native | 27118 |
| Nearctic | Zoogeographic realm | native | 9925 |
| Neman (Niamunas) River | River (basin) | native | 59043 |
| Neotropical | Zoogeographic realm | introduced | 5723 |
| New Zealand Shelf | Sea/Bay/Gulf | introduced | 1739 |
| North Sea | Sea/Bay/Gulf | native | 173 |
| Northeast U.S. Continental Shelf | Sea/Bay/Gulf | native | 35388 |
| Northern Atlanto-Baltic river drainages and lakes | River (basin) | native | 59043 |
| Norwegian Sea | Sea/Bay/Gulf | native | 173 |
| Oder | River (basin) | native | 59043 |
| Onega Lake | Lake | native | 59043 |
| Onega River | River (basin) | native | 59043 |
| Pacific Ocean | Sea/Bay/Gulf | introduced | 1739 |
| Palearctic | Zoogeographic realm | native | 5723 |
| Patagonian Shelf | Sea/Bay/Gulf | introduced | 1739 |
| Pechora | River (basin) | native | 59043 |
| Puget Sound | Sea/Bay/Gulf | not established | 11980 |
| Rhine | River (basin) | native | 2196 |
| Salish Sea | Sea/Bay/Gulf | not established | 11980 |
| Scotian Shelf | Sea/Bay/Gulf | native | 35388 |
| Seine | River (basin) | native | 59043 |
| Shetland islands basins | River (basin) | native | 59043 |
| Southern Baltic Coastal river drainages and lakes | River (basin) | native | 59043 |
| Southwest Chilean Waters | Sea/Bay/Gulf | introduced | 1739 |
| St. Lawrence Complex | River (basin) | native | 81264 |
| Strait of Georgia | Sea/Bay/Gulf | not established | 11980 |
| Tagus | River (basin) | extirpated | 59043 |
| Vistula | River (basin) | native | 59043 |
| Weser | River (basin) | native | 59043 |
| White Sea | Sea/Bay/Gulf | native | 118986 |
| Åland basins | River (basin) | native | 59043 |
| Öland basins | River (basin) | native | 59043 |