| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Adriatic Sea | Sea/Bay/Gulf | native | 41553 |
| Aegean Sea | Sea/Bay/Gulf | native | 113897 |
| Atlantic Ocean | Sea/Bay/Gulf | native | 4453 |
| Azores Islands | Sea/Bay/Gulf | native | 4453 |
| Balearic Islands | Sea/Bay/Gulf | native | 95727 |
| Baltic Sea | Sea/Bay/Gulf | native | 36252 |
| Benguela Current | Sea/Bay/Gulf | questionable | 4453 |
| Black Sea | Sea/Bay/Gulf | native | 4453 |
| Canary Current | Sea/Bay/Gulf | native | 4453 |
| Cantabrian Sea | Sea/Bay/Gulf | native | 57747 |
| Cape Verde | Sea/Bay/Gulf | native | 94080 |
| Celtic-Biscay Shelf | Sea/Bay/Gulf | native | 35388 |
| Corsica Island | Sea/Bay/Gulf | native | 96325 |
| Crete Island | Sea/Bay/Gulf | native | 113897 |
| Cruiser Tablemount | Seamount | native | 50492 |
| Evvoikos Gulf | Sea/Bay/Gulf | native | 113897 |
| Faroe Plateau | Sea/Bay/Gulf | native | 35388 |
| Galician Shelf | Sea/Bay/Gulf | native | 57747 |
| German Bight | Sea/Bay/Gulf | native | |
| Iberian Coastal | Sea/Bay/Gulf | native | 35388 |
| Iceland Shelf and Sea | Sea/Bay/Gulf | native | 35388 |
| Ionian Sea | Sea/Bay/Gulf | native | 113897 |
| Irish Sea | Sea/Bay/Gulf | native | 6521 |
| Josephine Seamount | Seamount | native | 50492 |
| Korinthiakos Gulf | Sea/Bay/Gulf | native | 113897 |
| Le Danois Bank | Seamount | native | 57747 |
| Levantine Sea | Sea/Bay/Gulf | native | 104125 |
| Mediterranean Sea | Sea/Bay/Gulf | native | 12382 |
| Milne Bay | Sea/Bay/Gulf | native | 41553 |
| North Aegean | Sea/Bay/Gulf | native | 113897 |
| North Sea | Sea/Bay/Gulf | native | 4645 |
| Norwegian Sea | Sea/Bay/Gulf | native | 4645 |
| Pacific Ocean | Sea/Bay/Gulf | questionable | 4645 |
| Pagassitikos Gulf | Sea/Bay/Gulf | native | 113897 |
| Plateau Seamount | Seamount | native | 50492 |
| Samar Sea | Sea/Bay/Gulf | questionable | 29039 |
| Sardinia Island | Sea/Bay/Gulf | native | 13729 |
| Saronikos Gulf | Sea/Bay/Gulf | native | 113897 |
| Sea of Marmara | Sea/Bay/Gulf | native | 57855 |
| Sicily Island | Sea/Bay/Gulf | native | 13729 |
| South Aegean | Sea/Bay/Gulf | native | 113897 |
| Tagus | River (basin) | native | 51031 |
| Thermaikos Gulf | Sea/Bay/Gulf | native | 113897 |