Hypostomus fluviatilis
Hypostomus fluviatilis is a species of catfish in the family Loricariidae. It is a freshwater fish native to South America, where it occurs in the Rio Grande basin in the Paraná River drainage in Brazil, with its type locality being the Mojiguaçu River. The species reaches 16.5 cm (6.5 inches) in standard length and is believed to be a facultative air-breather. References 

fluviatilis
Fish described in 1964
Catfish of South America