| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Adriatic Sea | Sea/Bay/Gulf | native | 81817 |
| Aegean Sea | Sea/Bay/Gulf | native | 113897 |
| Agulhas Current | Sea/Bay/Gulf | native | 41670 |
| Arabian Sea | Sea/Bay/Gulf | native | 4645 |
| Atlantic Ocean | Sea/Bay/Gulf | native | 4426 |
| Balearic Islands | Sea/Bay/Gulf | native | 95727 |
| Baltic Sea | Sea/Bay/Gulf | native | 36252 |
| Barents Sea | Sea/Bay/Gulf | native | 80858 |
| Benguela Current | Sea/Bay/Gulf | questionable | 4426 |
| Black Sea | Sea/Bay/Gulf | native | 41670 |
| Canary Current | Sea/Bay/Gulf | native | 4426 |
| Cantabrian Sea | Sea/Bay/Gulf | native | 57747 |
| Celtic-Biscay Shelf | Sea/Bay/Gulf | native | 35388 |
| Corsica Island | Sea/Bay/Gulf | native | 96325 |
| Crete Island | Sea/Bay/Gulf | native | 113897 |
| 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 | |
| Guinea Current | Sea/Bay/Gulf | native | 3167 |
| Iberian Coastal | Sea/Bay/Gulf | native | 4645 |
| Iceland Shelf and Sea | Sea/Bay/Gulf | native | 35388 |
| Indian Ocean | Sea/Bay/Gulf | native | 4426 |
| Ionian Sea | Sea/Bay/Gulf | native | 113897 |
| Irish Sea | Sea/Bay/Gulf | native | 3167 |
| Korinthiakos Gulf | Sea/Bay/Gulf | native | 113897 |
| Le Danois Bank | Seamount | native | 57747 |
| Mediterranean Sea | Sea/Bay/Gulf | native | 41523 |
| North Aegean | Sea/Bay/Gulf | native | 113897 |
| North Sea | Sea/Bay/Gulf | native | 3167 |
| Norwegian Sea | Sea/Bay/Gulf | native | 117987 |
| Pagassitikos Gulf | Sea/Bay/Gulf | native | 113897 |
| Persian Gulf | Sea/Bay/Gulf | native | 4645 |
| Sardinia Island | Sea/Bay/Gulf | native | 13729 |
| Saronikos Gulf | Sea/Bay/Gulf | native | 113897 |
| Sea of Azov | Sea/Bay/Gulf | questionable | |
| 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 |