Harrison, 1978 Pseudosimochromis margaretae is a species of cichlid endemic to Lake Tanganyika where it is only known from the area of Kigoma in Tanzania.

It prefers waters with rock-rubble substrates, mostly at less than 5 metres (16 ft) but not deeper than 10 metres (33 ft).

It can reach a length of 8.1 centimetres (3.2 in) SL.

It can also be found in the aquarium trade.

[2] The specific name honours Margaret Mary Smith (1916-1987), who was the first director of the J.L.B.