| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Benue | River (basin) | native | 81282 |
| Chad | River (basin) | native | 81282 |
| Cross | River (basin) | native | 81639 |
| Ethiopian | Zoogeographic realm | endemic | 2801 |
| Mono | River (basin) | native | 81282 |
| Niger | River (basin) | native | 13331 |
| Ogun | River (basin) | native | 81282 |
| Ouémé | River (basin) | native | 81282 |
| Volta | River (basin) | native | 13331 |