Ocellate river stingray (Potamotrygon motoro)
The ocellate river stingray is a species of freshwater stingray in the family Potamotrygonidae. It was the first species to be described in the family and is also the most widespread, ranging throughout much of the Río de la Plata, Amazon, Mearim and Orinoco basins in tropical and subtropical South America.
photo credits: Steven G. Johnson