The Negro Amazon River is famous as one of the crucial rivers of the country and the biggest left bank tributary of the river Amazon. The Rio Negro Amazon River Venezuela is one of its kinds, being the greatest black water river in the entire world.

The literal meaning of Rio Negro is 'Black River', but the exact shade is not really black. Compared to the light brown color of the Amazon and Orinoco rivers, Rio Negro is very dark.

The river resembles the color of tea to be more precise. The reason behind this color is the presence of tannins or humic acids, which are certain complex organic compounds produced by plants to keep herbivores at bay. Thus it is from the presence of vegetal debris that Rio Negro gets its name.

Rio Negro originates as the Guainia River in eastern Colombia and then flows through the Colombia-Venezuela border. It then changes its direction and flows through Brazil and finally meets the Amazon River at the city of Manaus. The Rio Negro is fed by its primary tributary, the Rio Branco and also has many secondary channels as well as numerous Islands.