Tilapia is a genealogy of cichlidaceae (Cichlidae) family, which includes endemic hot water fish in Africa. Omnivor fishes and nest at the bottom of the pool. Male fishes carry eggs and larvae in the genus Sarotherodon. Female fish carries eggs and larvae in the genus Oreochromis. They are resistant to pH between 5 and 11 and ammonia concentration of 2.5 mg / L. Although tilapia is freshwater fish, some species can live in a certain amount of salt water.