Hypostomus cochliodon

Hypostomus cochliodon is a species of armored catfish native to the Paraguay and middle Paraná River basins in northern Argentina, southern Brazil and Paraguay. Initially it did not occur in the upper Paraná basin above the Guaíra Falls, but these disappeared after the construction of the Itaipu Dam, allowing this species (and several others) to spread. It grows to a standard length of 23 cm (9.1 in).