Pseudotropheus saulosi is a species of cichlid endemic to Lake Malawi where it prefers areas with rocky substrates. It is classified as a dwarf-mbuna and was discovered by Ad Konings in 1989. It comes from an area of the lake called Taiwan Reef, and from nowhere else. This species can reach a length of 10 centimetres (3.9 in) TL. The fish are born yellow but as they reach maturity males turn blue with several vertical black bars. Not all males turn and it is possible for some males to remain mixed in with the females, in full female dress. When the dominant male leaves a certain group, one of these incognito males may color up and become dominant. This fish can also be found in the aquarium trade. Pseudotropheus saulosi is a maternal mouthbrooder. The female holds the eggs in her mouth unt