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Petrotilapia flaviventris (formerly known as Petrotilapia sp."yellow ventral") can be found between Undu Point in Tanzania and Mbweca in Mocambique. Mainly they are living in rocky environments however sometimes they are also seen in intermediate zones between rocks and sand. There are some geographic variants of this species like this one which can be found in the neighbourhood of Hai Reef; this reef is also called Chimate Reef. In the lake the males of these species can grow to 16 cm, in the aquarium however they can grow a little taller because of a good feeding. The males can then grow to about 18 cm, females grow to about 14 cm. Petrotilapia flaviventris can behave intolerant against equal species, against other inhabitants they are in general tolerant. You can best keep this species together with multiple females and other mbunas in an aquarium with a lot of hiding places. In the lake they are mainly feeding themselves with algae which they find on the rocks. In the aquarium they are comfortable with any food. They take everything they get offered, like spirulina pellets, mysis, artemia, cyclops and shrimp-peas mix. Food rich of algae like spirulina pellets or flakes is very important to them so this should not be missing on their menu. 
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