Petrochromis polyodon

{{Short description|Species of fish}}

{{Speciesbox

| image = Petrochromis polyodon.jpg

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Bigirimana, C. |date=2006 |title=Petrochromis polyodon |volume=2006 |page=e.T60652A12391814 |doi=10.2305/IUCN.UK.2006.RLTS.T60652A12391814.en |access-date=15 November 2021}}

| taxon = Petrochromis polyodon

| authority = Boulenger, 1898

| synonyms =

• Perissodus polyodon (Boulenger, 1898)
• Petrochromis nyassae Boulenger, 1902

}}

Petrochromis polyodon is a species of cichlid endemic to Lake Tanganyika found in areas with rocky substrates where it can graze on algae. This species coexists with other herbivorous cichlids such as Tropheus moorii and Telmatochromis temporalis.{{cite journal | last1 = Takamura | first1 = Kenzi | year = 1984 | title = Interspecific Relationships of Aufwuchs-eating Fishes in Lake Tanganyika | journal = Environmental Biology of Fishes | volume = 10 | issue = 4| pages = 225–41 | doi=10.1007/BF00001476| bibcode = 1984EnvBF..10..225T | s2cid = 27652523 }} Individuals can reach lengths of 40 cm or 16 inches and 1 kg in weight. They can be found in the aquarium trade.{{FishBase |genus= Petrochromis|species= polyodon| month = April | year = 2013}}