''Petrochromis polyodon'' is a species of

cichlid Cichlids are fish from the family Cichlidae in the order Cichliformes. Cichlids were traditionally classed in a suborder, the Labroidei, along with the wrasses ( Labridae), in the order Perciformes, but molecular studies have contradicted this ...

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

Lake Tanganyika Lake Tanganyika () is an African Great Lake. It is the second-oldest freshwater lake in the world, the second-largest by volume, and the second-deepest, in all cases after Lake Baikal in Siberia. It is the world's longest freshwater lake. ...

found in areas with rocky substrates where it can graze on algae. This species coexists with other herbivorous cichlids such as ''

Tropheus moorii ''Tropheus moorii'' (blunthead cichlid) is a species of cichlid endemic to Lake Tanganyika in Africa. Over 40 different color morphs of this species are dispersed throughout the lake, ranging from dark green to flame red and yellow. They mostl ...

'' and ''

Telmatochromis temporalis ''Telmatochromis temporalis'' is a species of cichlid endemic to Lake Tanganyika where they areas with rocky substrates usually at depths of from though occasionally down to . This species can reach a length of TL. It can also be found in ...

''. Individuals can reach lengths of 40cm or 16 inches and 1kg in weight. They can be found in the

aquarium An aquarium (plural: ''aquariums'' or ''aquaria'') is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aq ...

trade.

References

polyodon The American paddlefish (''Polyodon spathula,'' also known as a Mississippi paddlefish, spoon-billed cat, or spoonbill) is a species of ray-finned fish. It is the only extant taxon, living species of paddlefish (Polyodontidae). This family is m ...

Taxa named by George Albert Boulenger Fish described in 1898 Taxonomy articles created by Polbot {{Cichlidae-stub