The redbelly tilapia (Coptodon zillii) is a species of fish in the cichlid family. It is found widely in Africa and the Middle East, but has also been introduced outside its native range. It is an important food fish and sometimes seen in the aquarium trade. Its natural habitats are marginal vegetation and seasonal floodplain streams, lakes, and ponds. It was formerly included in the genus Tilapia as Tilapia zillii.