| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Benue | River (basin) | native | 13331 |
| Cross | River (basin) | native | 13331 |
| Ethiopian | Zoogeographic realm | endemic | 13331 |
| Fatala | River (basin) | questionable | 13331 |
| Great Scarcies | River (basin) | questionable | 13331 |
| Kogon | River (basin) | questionable | 13331 |
| Konkouré | River (basin) | questionable | 13331 |
| Niger | River (basin) | native | 53405 |
| Rio del Rey | River (basin) | native | 81260 |
| Wouri | River (basin) | native | 52307 |