| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Arkansas River | River (basin) | native | 1998 |
| Lake Winnipeg | Lake | native | 86798 |
| Mackenzie | River (basin) | native | 5723 |
| Mississippi River | River (basin) | native | 1998 |
| Mississippi-Missouri | River (basin) | native | 5723 |
| Missouri River | River (basin) | native | 78789 |
| Nearctic | Zoogeographic realm | endemic | 5723 |
| Nelson-Saskatchewan | River (basin) | native | 5723 |
| Pecos River | River (basin) | native | 86798 |
| Rio Grande | River (basin) | native | 5723 |
| Saskatchewan River | River (basin) | native | 86798 |