| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Aegean Sea | Sea/Bay/Gulf | introduced | 2684 |
| Atlantic Ocean | Sea/Bay/Gulf | native | 317 |
| Baltic Sea | Sea/Bay/Gulf | introduced | 3700 |
| Barents Sea | Sea/Bay/Gulf | introduced | 3527 |
| Black Sea | Sea/Bay/Gulf | introduced | 113928 |
| Black Sea - province | Sea/Bay/Gulf | introduced | 113928 |
| Bohai Sea | Sea/Bay/Gulf | native | 75831 |
| Carolinian | Sea/Bay/Gulf | native | 83434 |
| Celtic-Biscay Shelf | Sea/Bay/Gulf | introduced | 1314 |
| Central Arctic | Sea/Bay/Gulf | native | 95344 |
| Cold Temperate Northeast Pacific | sea/bay/gulf | native | 7726 |
| Cold Temperate Northwest Atlantic | sea/bay/gulf | native | 2823 |
| Cold Temperate Northwest Pacific | sea/bay/gulf | native | 75831 |
| German Bight | Sea/Bay/Gulf | introduced | 2707 |
| Gulf of Maine | Sea/Bay/Gulf | native | 1314 |
| Lusitanian | sea/bay/gulf | introduced | 74657 |
| Mediterranean Sea | Sea/Bay/Gulf | introduced | 128262 |
| North and East Barents Sea | Sea/Bay/Gulf | introduced | 113991 |
| North Sea | Sea/Bay/Gulf | introduced | 1314 |
| Northern European Seas | Sea/Bay/Gulf | introduced | 7693 |
| Northern Norway and Finnmark | Sea/Bay/Gulf | introduced | 113986 |
| Oregon, Washington, Vancouver Coast and Shelf | Sea/Bay/Gulf | native | 94068 |
| Pacific Ocean | Sea/Bay/Gulf | native | 81863 |
| Puget Sound | Sea/Bay/Gulf | native | 94068 |
| Puget Trough/Georgia Basin | Sea/Bay/Gulf | native | 93817 |
| Sakhalin Island | River (basin) | native | 113989 |
| Salish Sea | Sea/Bay/Gulf | native | 93817 |
| Scotian Shelf | Sea/Bay/Gulf | native | 7726 |
| Sea of Azov | Sea/Bay/Gulf | introduced | 113990 |
| Strait of Georgia | Sea/Bay/Gulf | native | 93817 |
| Temperate Northern Atlantic | sea/bay/gulf | native | 1314 |
| Temperate Northern Pacific | sea/bay/gulf | native | 75831 |
| Tropical East Pacific | sea/bay/gulf | native | 1314 |
| Virginian | Sea/Bay/Gulf | native | 83435 |
| Warm Temperate Northwest Atlantic | sea/bay/gulf | native | 83434 |
| White Sea | Sea/Bay/Gulf | introduced | 121741 |
| Yellow Sea | Sea/Bay/Gulf | native | 75831 |