The kululu (Sarotherodon steinbachi) e.g. Vikululu - Nikululu - Akululu - Bokululu - Hekululu is a species of cichlid endemic to Lake Barombi Mbo in western Cameroon.

This species can reach a length of 11.3 centimetres (4.4 in) SL.

[2] It is threatened because of pollution and sedimentation due to human activities.

It is potentially also threatened by large emissions of carbon dioxide (CO2) from the lake's bottom (compare Lake Nyos),[1] although studies indicate that Barombo Mbo lacks excess amounts of this gas.

[2] The specific name honours the entomologist Gerhard Steinbach (1923-2016) of the Humboldt University of Berlin who was a member of an expedition which was led by zoologist Martin Eisentraut on which the type of this cichlid was collected.