| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Cross | River (basin) | native | 85170 |
| Ethiopian | Zoogeographic realm | endemic | 7093 |
| Mungo | River (basin) | native | 81632 |
| Niger | River (basin) | native | 81268 |
| Ogun | River (basin) | native | 81268 |
| Oshun | River (basin) | native | 81268 |
| Ouémé | River (basin) | native | 81268 |
| Wouri | River (basin) | native | 81632 |