| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Agnébi | River (basin) | native | 13331 |
| Bia | River (basin) | native | 83625 |
| Ethiopian | Zoogeographic realm | endemic | 5714 |
| Fatala | River (basin) | native | 28587 |
| Gambia | River (basin) | native | 13331 |
| Kogon | River (basin) | native | 53405 |
| Little Scarcies | River (basin) | native | 13331 |
| Niger | River (basin) | questionable | 3055 |
| Saint John | River (basin) | native | 13331 |
| Saint Paul | River (basin) | native | 13331 |
| Sewa | River (basin) | native | 13331 |
| Tano | River (basin) | native | 53405 |