PetrochromisPetrochromis is a genus of cichlids endemic to Lake Tanganyika in east Africa.SpeciesThere are currently 8 recognized species are in this genus:Petrochromis ephiphium Brichard, 1989Petrochromis famula Matthes & Trewavas, 1960Petrochromis fasciolatus Boulenger, 1914Petrochromis horii Takahashi & Koblmüller, 2014Petrochromis macrognathus Yamaoka, 1983Petrochromis orthognathus Matthes, 1959Petrochromis polyodon Boulenger, 1898Petrochromis trewavasae Poll, 1948