Otocinclus mura
Otocinclus mura is a species of catfish in the family Loricariidae. It is native to South America, where it is known only from the Amazon River basin in Brazil. It is a small loricariid, although it is not particularly small when compared with other Otocinclus species, reaching 3.6 cm (1.4 inches) SL. While it is known to appear in the aquarium trade, it does not have a widely used common name. References 

Hypoptopomatini
Fish of the Amazon basin
Freshwater fish of Brazil
Endemic fauna of Brazil
Fish described in 1997
Taxa named by Scott Allen Schaefer