| 生態系 | 類型 | 狀態 | 參考文獻 |
|---|---|---|---|
| Acre | River (basin) | native | 97592 |
| Amazon | River (basin) | native | 37025 |
| Araguaia | River (basin) | native | 12225 |
| Machado | River (basin) | native | 97589 |
| Magdalena | River (basin) | native | 37025 |
| Neotropical | Zoogeographic realm | endemic | 12225 |
| Orinoco | River (basin) | native | 37025 |
| Paraná | River (basin) | native | 12225 |
| São Francisco | River (basin) | native | 37025 |