Petrochromis is a genus of cichlids endemic to Lake Tanganyika in east Africa.
Species There are currently 8 recognized species are in this genus: Petrochromis ephippium Brichard, 1989 Petrochromis famula Matthes & Trewavas, 1960 Petrochromis fasciolatus Boulenger, 1914 Petrochromis horii Takahashi & Koblmüller, 2014 Petrochromis macrognathus Yamaoka, 1983 Petrochromis orthognathus Matthes, 1959 Petrochromis polyodon Boulenger, 1898 Petrochromis trewavasae Poll, 1948 (Thread-fin cichlid)
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