Deepest River in The World

After watching a documentary by national geographic, I learned that the deepest river is the Congo river found in the southwestern part of africa. It's deepest part reached 755ft(230m) and as deep as the trenches found in the oceans. This is remarkbly deep for a river, there were new species discovered here. Because of strong currents dividing some parts of it, some species are genetically distinct from other fish on the other side. There are over 300 species living in the congo river. One of the new species discovered here is the perciform fish(lamprologus lethops). see national geographic