Tilapia is a genus of cichlid fishes endemic to freshwater habitats in Southern Africa. Lamprologus ocellatus is a species of shell dwelling cichlid endemic to Lake Tanganyika. Once the catfish eggs hatch the young eat the cichlid eggs. Numerous cichlid species have been selectively bred to develop ornamental aquarium strains. The popularity of the flowerhorn cichlid declined in 2004. The ram cichlid is popular in the tropical freshwater community aquarium. Nile perch gradually exterminated the lake's 500 endemic cichlid species. These species include the firemouth cichlid, convict cichlid, Mayan cichlid, and Salvin's cichlid. It is the most popular African cichlid amongst aquarium hobbyists. Tanganyika has the largest number of endemic cichlid genera of all African lakes. The lake holds at least 250 species of cichlid fish and undescribed species remain. "Synodontis multipunctatus" are a popular addition to cichlid aquariums. A non-native cichlid, a tilapia, is used widely in aquaculture within the lake. The cichlid fish "V. moorii" exhibits biparental care. Punishment is also a method used by cichlid "Neolamprologous pulcher" in their cooperative breeding systems.