| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Danube | River (basin) | native | 5723 |
| Erqishi River | River (basin) | native | 41093 |
| Kara River | River (basin) | native | 59043 |
| Mackenzie | River (basin) | native | 78982 |
| Mississippi Complex | River (basin) | native | 81264 |
| Missouri River | River (basin) | native | 5723 |
| Nearctic | Zoogeographic realm | endemic | 27547 |
| Ob River | River (basin) | native | 59043 |
| Palearctic | Zoogeographic realm | introduced | 5723 |
| Pechora | River (basin) | native | 59043 |
| St. Lawrence Complex | River (basin) | native | 81264 |
| Yenisei River | River (basin) | native | 59043 |
| Yukon | River (basin) | native | 78812 |