The Congo River flows through the Democratic Republic of the Congo and borders the Republic of the Congo. The river and the country it flows through were once called Zaire and the Zaire River.
The Congo River is one of the deepest in the world, reaching depths of 720 feet. The river also has the second largest flow of water in the world, only beaten by the Amazon River. The river has 700 known species of fish in its waters, with the possibility of more being discovered in the future. There are large sections that have yet to be studied which may reveal more about the species in the river and the river itself.