Demeni ( port. Rio Demini ) is a river in northwestern Brazil , in the state of Amazonas , near the border with Venezuela . It belongs to the Amazon Basin , is one of the tributaries of the Rio Negru , into which it flows near the city of Barcelos . Its tributaries include the Tutotobi [1] and [2] .
| Demeny | |
|---|---|
| port. Rio demini | |
| Watercourse | |
| Source | |
| • Coordinates | |
| Mouth | Rio negru |
| • Coordinates | |
| Location | |
| A country |
|
| Region | Amazonas |
 - source  - mouth | |
In the vicinity of the river live Indian tribes Tukano and Yanomamo .