(Stomatepia mariae)
The nsess (Stomatepia mariae) is a species of cichlid endemic to Lake Barombi Mbo in western Cameroon.It can also be found in the aquarium trade.[2] 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),[1] although studies indicate that Barombo Mbo lacks excess amounts of this gas.