Petrochromis orthognathus
Petrochromis orthognathus is a species of cichlid endemic to Lake Tanganyika found in areas with rocky substrates on which they can graze on algae. This species can reach a length of . It can be found in the aquarium trade. References

orthognathus
Fish described in 1959
Taxa named by Hubert Matthes
Taxonomy articles created by Polbot