Rhino-Pleco (Pterygoplichthys scrophus)
These plecos have large nostril two horn-like protrusions from their head that are actually nasal flutes or nostril flaps. The also have alligator-like ridges along the sides of their body. Colours range from a rich brown to black to mottled brown.
In Aquariums and Zoos: very rare in european aquariums