| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Acre | River (basin) | native | 97592 |
| Amazon | River (basin) | native | 598 |
| Araguaia | River (basin) | native | 87186 |
| Jaguaribe | River (basin) | native | 124043 |
| Machado | River (basin) | native | 97589 |
| Marañón | River (basin) | native | 124043 |
| Negro | River (basin) | native | 124043 |
| Neotropical | Zoogeographic realm | endemic | 598 |
| Orinoco | River (basin) | native | 87186 |
| Paraguay | River (basin) | native | 124043 |
| Paraná | River (basin) | native | 56308 |
| Paranaíba | River (basin) | native | 124043 |
| Solimões | River (basin) | native | 124043 |
| Tapajós | River (basin) | native | 124043 |
| Uruguay | River (basin) | native | 56308 |
| Xingu | River (basin) | native | 124043 |