| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Chiloango | River (basin) | questionable | 81628 |
| Cross | River (basin) | native | 53784 |
| Ethiopian | Zoogeographic realm | endemic | 3188 |
| Niger | River (basin) | native | 13331 |
| Ogun | River (basin) | native | 81263 |
| Ouémé | River (basin) | native | 81263 |
| Sanaga | River (basin) | native | 81628 |
| Wouri | River (basin) | native | 81628 |