| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Aegean Sea | Sea/Bay/Gulf | native | 113897 |
| Atlantic Ocean | Sea/Bay/Gulf | native | 4119 |
| Baffin Bay | Sea/Bay/Gulf | native | 4119 |
| Balkan river drainages and lakes | River (basin) | native | 59043 |
| Baltic Sea | Sea/Bay/Gulf | native | 36252 |
| Barents Sea | Sea/Bay/Gulf | native | 120407 |
| 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 |
| Black Sea | Sea/Bay/Gulf | native | 683 |
| British islands basins | River (basin) | native | 59043 |
| Bug | River (basin) | native | 59043 |
| California Current | Sea/Bay/Gulf | native | 5723 |
| Canadian Eastern Arctic - West Greenland | Sea/Bay/Gulf | native | 35388 |
| Caspian Sea | Lake | introduced | 39702 |
| Celtic-Biscay Shelf | Sea/Bay/Gulf | native | 35388 |
| Central Dnieper | River (basin) | native | 59043 |
| Central Don | River (basin) | native | 59043 |
| Central Turkey river drainages and lakes | River (basin) | native | 59043 |
| Chesapeake Bay | Sea/Bay/Gulf | Native | 93252 |
| Chukchi Sea | Sea/Bay/Gulf | native | 121277 |
| Corsica Island | Sea/Bay/Gulf | native | 96325 |
| Crete Island | Sea/Bay/Gulf | native | 113897 |
| Crimean Peninsula | River (basin) | native | 59043 |
| Danish islands basins | River (basin) | native | 59043 |
| Danube | River (basin) | native | 4119 |
| Danube Delta | River (basin) | native | 59043 |
| Denmark river drainages and lakes | River (basin) | native | 59043 |
| Desna | River (basin) | native | 59043 |
| Dnester | River (basin) | native | 59043 |
| Dnieper | River (basin) | native | 683 |
| Dnieper-Bug Liman | River (basin) | native | 59043 |
| Don | River (basin) | native | 58293 |
| Don Delta | River (basin) | native | 59043 |
| East Bering Sea | Sea/Bay/Gulf | native | 5723 |
| East China Sea | Sea/Bay/Gulf | native | 2850 |
| Eastern Black Sea | River (basin) | native | 59043 |
| Eastern Mediterranean river drainages and lakes | River (basin) | native | 59043 |
| Elbe River | River (basin) | native | 51031 |
| Faroe islands basins | River (basin) | native | 59043 |
| Faroe Plateau | Sea/Bay/Gulf | native | 35388 |
| Fraser | River (basin) | native | 78809 |
| Garonne | River (basin) | native | 40476 |
| German Bight | Sea/Bay/Gulf | native | |
| Goryn | River (basin) | native | 59043 |
| Gotland basins | River (basin) | native | 59043 |
| Greenland Sea | Sea/Bay/Gulf | native | 35388 |
| Gulf of Alaska | Sea/Bay/Gulf | native | 5723 |
| Gulf of Maine | Sea/Bay/Gulf | native | 86779 |
| 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 |
| Ionian Sea | Sea/Bay/Gulf | native | 113897 |
| Ireland river drainages and lakes | River (basin) | native | 59043 |
| Irish Sea | Sea/Bay/Gulf | native | 9488 |
| Juan de Fuca Strait | Sea/Bay/Gulf | native | 10929 |
| Kara Sea | Sea/Bay/Gulf | native | 123027 |
| Khoper | River (basin) | native | 59043 |
| Krinka | River (basin) | native | 59043 |
| Kuban River | River (basin) | native | 58296 |
| Kuroshio Current | Sea/Bay/Gulf | native | 35388 |
| Labrador - Newfoundland | Sea/Bay/Gulf | native | 35388 |
| Lake Peipus | Lake | native | 122793 |
| Lower Danube | River (basin) | native | 59043 |
| Lower Dnieper | River (basin) | native | 59043 |
| Lower Prypiats | River (basin) | native | 59043 |
| Mediterranean Sea | Sea/Bay/Gulf | native | 4645 |
| Medvedista | River (basin) | native | 59043 |
| Nearctic | Zoogeographic realm | native | 2850 |
| Neman (Niamunas) River | River (basin) | native | 59043 |
| North Aegean | Sea/Bay/Gulf | native | 113897 |
| North and East Barents Sea | Sea/Bay/Gulf | native | 80862 |
| North Sea | Sea/Bay/Gulf | native | 556 |
| 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 | 4645 |
| Oder | River (basin) | native | 59043 |
| Onega River | River (basin) | native | 55804 |
| Oyashio Current | Sea/Bay/Gulf | native | 35388 |
| Pacific Ocean | Sea/Bay/Gulf | native | 4116 |
| Palearctic | Zoogeographic realm | native | 4119 |
| Po | River (basin) | native | 59043 |
| Prut | River (basin) | native | 59043 |
| Psel | River (basin) | native | 59043 |
| Puget Sound | Sea/Bay/Gulf | native | 10929 |
| Rhine | River (basin) | native | 59043 |
| Rhône | River (basin) | native | 40476 |
| Sakarya Nehri | River (basin) | native | 59043 |
| Sakhalin Island | River (basin) | native | 58299 |
| Sal | River (basin) | native | 59043 |
| Salish Sea | Sea/Bay/Gulf | native | 10929 |
| Sarata | River (basin) | native | 59043 |
| Scotian Shelf | Sea/Bay/Gulf | native | 35388 |
| Sea of Azov river drainages and lakes | River (basin) | native | 59043 |
| Sea of Japan/East Sea | Sea/Bay/Gulf | native | 559 |
| Sea of Marmara | Sea/Bay/Gulf | native | 57855 |
| Sea of Okhotsk | Sea/Bay/Gulf | native | 50550 |
| Seine | River (basin) | native | 59043 |
| Severn | River (basin) | native | 49557 |
| Severskiy Donets | River (basin) | native | 59043 |
| Shetland islands basins | River (basin) | native | 59043 |
| Siret | River (basin) | native | 59043 |
| Small Don Central | River (basin) | native | 59043 |
| South Aegean | Sea/Bay/Gulf | native | 113897 |
| Southern Baltic Coastal river drainages and lakes | River (basin) | native | 59043 |
| Strait of Georgia | Sea/Bay/Gulf | native | 10929 |
| Syvash abo Gnyle more | River (basin) | native | 59043 |
| Teterev | River (basin) | native | 59043 |
| Upper Dnieper | River (basin) | native | 59043 |
| Upper Don | River (basin) | native | 59043 |
| Upper Prypiats | River (basin) | native | 59043 |
| Vistula | River (basin) | native | 59043 |
| Weser | River (basin) | native | 59043 |
| West Bering Sea | Sea/Bay/Gulf | native | 5723 |
| White Sea | Sea/Bay/Gulf | native | 124235 |
| Yegorlyk-Manych | River (basin) | native | 59043 |
| Yenice Irmagi | River (basin) | native | 59043 |
| Yukon | River (basin) | native | 78812 |
| Åland basins | River (basin) | native | 59043 |
| Öland basins | River (basin) | native | 59043 |