Cardiopharynx schoutedeni is a species of cichlid endemic to lake Tanganyika in East Africa. It is found in Burundi, the Democratic Republic of the Congo, Tanzania, and Zambia. This semi-pelagic fish prefers habitats over sandy bottoms where it feeds on aquatic microorganisms. It can reach a length of 15 centimetres (5.9 in) TL. It is also found in the aquarium trade.