Xingu River ray

The Xingu River ray, white-blotched river stingray, or polka-dot stingray (Potamotrygon leopoldi) is a species of freshwater fish in the Potamotrygonidae family. It is endemic to the Xingu River basin in Brazil and prefers rocky bottoms. It is sometimes kept in aquaria.

P. leopoldi reaches up to 40 cm (16 in) in disc width, 75 cm (30 in) in total length and 20 kg (44 lb) in weight. Females grow larger than males. It is closely related to the similar P. henlei from the Tocantins River basin and P. albimaculata from the Tapajós River basin.