Pterygoplichthys scrophus
Pterygoplichthys scrophus is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the basins of the Marañón River and the Ucayali River in Peru. The species reaches 27.5 cm (10.8 inches) in standard length and is known to be a facultative air-breather. Pterygoplichthys scrophus appears in the aquarium trade, where it may be known as the alligator pleco, the chocolate pleco, or the rhino pleco. References 

Hypostominae
Fish described in 1874
Fish of Peru
Catfish of South America
Taxa named by Edward Drinker Cope