| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Central Danube | River (basin) | native | 59043 |
| Danube | River (basin) | native | 556 |
| Danube Delta | River (basin) | native | 59043 |
| Dnester | River (basin) | native | 59043 |
| Drava River | River (basin) | native | 59043 |
| Lower Danube | River (basin) | native | 59043 |
| Palearctic | Zoogeographic realm | endemic | 556 |
| Prut | River (basin) | native | 59043 |
| Sava River | River (basin) | native | 59043 |
| Siret | River (basin) | native | 59043 |
| Tisza | River (basin) | native | 59043 |
| Upper Danube | River (basin) | native | 59043 |