(Pseudotropheus ater)
Pseudotropheus ater is a species of cichlid endemic to Lake Malawi where it is only known from around Chinyamwezi Island and Chinyankwazi Island.It prefers areas with rocky substrates at depths of from 3 to 15 metres (9.8 to 49.2 ft) where it grazes from the rock surfaces.This species can reach a length of 8.1 centimetres (3.2 in) SL.It can also be found in the aquarium trade.