Ancistrus montanus

Ancistrus montanus is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in high-altitude freshwater environments, with the type specimen being collected from an elevation of around 457 m (1500 ft), in the Beni River basin in the upper Madeira River drainage in Bolivia. The species reaches 9.2 cm (3.6 inches) SL.