| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Guadiana | River (basin) | introduced | 59043 |
| Iguazú River | River (basin) | native | 56308 |
| Mira | River (basin) | introduced | 59043 |
| Neotropical | Zoogeographic realm | endemic | 36377 |
| Palearctic | Zoogeographic realm | introduced | 36377 |
| Paraná | River (basin) | native | 56308 |
| Sado | River (basin) | introduced | 59043 |
| Uruguay | River (basin) | native | 56308 |