| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Arctic | Sea/Bay/Gulf | native | 118443 |
| Atlantic Ocean | Sea/Bay/Gulf | native | 5723 |
| Baltic Sea | Sea/Bay/Gulf | native | 36252 |
| Barents Sea | Sea/Bay/Gulf | native | 59043 |
| Barents Sea Islands basins | River (basin) | native | 59043 |
| Barents Sea river drainages and lakes | River (basin) | native | 59043 |
| Beaufort Sea | Sea/Bay/Gulf | native | 118001 |
| Beaufort Sea - continental coast and shelf | Sea/Bay/Gulf | native | 125579 |
| Central Arctic | Sea/Bay/Gulf | native | 5723 |
| Chukchi Sea | Sea/Bay/Gulf | native | 121277 |
| 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 |
| Gotland basins | River (basin) | native | 59043 |
| Great Lakes | Lake | native | 27547 |
| Kara Sea | Sea/Bay/Gulf | native | 124011 |
| Labrador - Newfoundland | Sea/Bay/Gulf | native | 1998 |
| Lake Peipus | Lake | native | 122793 |
| Mackenzie | River (basin) | native | 78982 |
| Mississippi River | River (basin) | native | 28923 |
| Nearctic | Zoogeographic realm | native | 27547 |
| Neman (Niamunas) River | River (basin) | native | 59043 |
| North Sea | Sea/Bay/Gulf | native | 6302 |
| Northeast U.S. Continental Shelf | Sea/Bay/Gulf | native | 5723 |
| Northern Atlanto-Baltic river drainages and lakes | River (basin) | native | 59043 |
| Northern Bering - Chukchi Seas | Sea/Bay/Gulf | native | 5723 |
| Oder | River (basin) | native | 59043 |
| Onega River | River (basin) | native | 55804 |
| Pacific Ocean | Sea/Bay/Gulf | native | 556 |
| Palearctic | Zoogeographic realm | native | 5723 |
| Pechora | River (basin) | native | 59043 |
| Sakhalin Island | River (basin) | native | 58299 |
| Scotian Shelf | Sea/Bay/Gulf | native | 1998 |
| Sea of Okhotsk | Sea/Bay/Gulf | native | 50550 |
| Southern Baltic Coastal river drainages and lakes | River (basin) | native | 59043 |
| Upper Volga | River (basin) | native | 59043 |
| Vistula | River (basin) | native | 59043 |
| Volga | River (basin) | questionable | 58297 |
| Weser | River (basin) | native | 59043 |
| Åland basins | River (basin) | native | 59043 |
| Öland basins | River (basin) | native | 59043 |