| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Atlantic Ocean | Sea/Bay/Gulf | native | 8434 |
| St. Helena and Ascension Islands | Sea/Bay/Gulf | native | 8434 |
| St. Helena and Ascension Islands - province | Sea/Bay/Gulf | native | 8434 |
| Tristan Gough | Sea/Bay/Gulf | native | 87394 |
| Tristan Gough - province | Sea/Bay/Gulf | native | 87394 |
| Tropical Atlantic | sea/bay/gulf | native | 8434 |