| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Acre | River (basin) | native | 97592 |
| Amazon | River (basin) | native | 4537 |
| Machado | River (basin) | native | 97589 |
| Magdalena | River (basin) | native | 26543 |
| Neotropical | Zoogeographic realm | endemic | 39524 |
| Orinoco | River (basin) | native | 39524 |
| Pará-Tocantins | River (basin) | native | 39524 |
| Paraguay | River (basin) | native | 39524 |
| Paraná | River (basin) | native | 53011 |
| São Francisco | River (basin) | native | 4537 |