Ocellate river stingray (Potamotrygon motoro) at the New England Aquarium, Boston MA.
Date 16 August 2008
Author Steven G. Johnson https://commons.wikimedia.org/wiki/User:Stevenj
Source: https://commons.wikimedia.org/wiki/File:Ocellate_river_stingray,_Boston_Aquarium.jpg

The ocellate river stingray or peacock-eye stingray (Potamotrygon motoro) is a species of freshwater stingray in the family Potamotrygonidae. It is widespread throughout much of the Río de la Plata, Amazon, Mearim and Orinoco basins in tropical and subtropical South America.