Pseudorinelepis genibarbis is a species of armored catfish native to Brazil, Peru, and Ecuador where it is found in the Amazon basin.

P. genibarbis may be completely dark brown to black, mottled with tan to dark brown background and black streaks, or light tan with large, sparse spots located at base of lateral plates, fin membranes, and abdomen.

It has been suggested that breeding males may also have orange on the cheeks and dorsal and caudal fin spines, although this may be restricted to fish from the Branco River.

[2] This species is an armored catfish which, since the 1990s, has started to be offered quite regularly as an aquarium fish under the name "Pineapple Pleco".

The armour is also pleasantly spiked along the sides of the fish, which causes the pineapple resemblance celebrated in the commercial name of the species.

[5] Sexual dimorphism is slight, being determined mainly by a more rounded body shape in the females, and orange "cheeks", this refers to the operculum, in the males.