The species in question are the Hypostomus plecostomus (common pleco), Pterygoplichthys pardalis (Amazon sailfin catfish) and Pterygoplichthys disjunctivus (Vermiculated sailfin catfish).
In central Peru, the Andes mountains carve the landscape and direct rivers through the towering peaks. More than 1,000 feet above sea level, one fish navigates the winding rivers of the Pampa de ...