(Sarotherodon linnellii)
Sarotherodon linnellii,sometimes known as the unga,blackfin tilapia or blackbelly tilapia,is a cichlid endemic to Lake Barombi Mbo in western Cameroon.This species reaches a length of 18.5 centimetres (7.3 in) SL.It is critically endangered 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),although studies indicate that Barombo Mbo lacks excess amounts of this gas.