Most Mbuna are cichlids that live among the piles of rocks and along the rocky shores of Lake Malawi. Their striking colors, intriguing behavioral characteristics, and relative hardiness make them very popular despite their unique demands for the home aquarium.
These cichlids are some of the most colorful freshwater fish for the home aquarium. Mbuna are very aggressive and territorial fish, they are not suitable for beginner fishkeepers.
Diet: Most are Herbivores and primarily feed on "Aufwuchs", which is a combination algae, diatoms, biofilm, and tiny organisms like crustaceans and insect larvae. In the wild, this film grows naturally on the rocks in the shallow parts of the lake.
In the aquarium use a high quality, low protein mixed plant based diet of flakes or pellets. If fed a high protein diet regularily, it will cause bloat.
Habitat: A suitable aquarium includes many rocks, adequate filtration, caves, and hiding places; plants may be uprooted, so they are best avoided, but a small number will work well in the aquarium. One of these is Java Fern, which may become the object of mbuna aggression, but will not be eaten due to an undesirable taste.
Tempermant: Mbuna exhibit strong social behavior and establish a clearly visible social hierarchy including well-defined and enforced territories. A dominant male maintains a spherical territory, only allowing females to enter this territory for breeding purposes. Overcrowding helps spread out the aggression caused by these territorial conflicts. They are maternal mouthbrooders and breed readily in good conditions.
Source:
https://en.wikipedia.org/wiki/Mbuna