| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Amazon | River (basin) | native | 12371 |
| Magdalena | River (basin) | native | 26543 |
| Marañón | River (basin) | native | 6329 |
| Neotropical | Zoogeographic realm | endemic | 36506 |
| Orinoco | River (basin) | native | 26543 |
| Paraná | River (basin) | native | 26076 |
| Uruguay | River (basin) | native | 79585 |