Potamotrygonidae

long-tailed river stingray

Plesiotrygon iwamae

Main channel and lower tributaries

• Tropical
• Lower river
• Upper river
• Southern Hemisphere
• Regional distribution
• Freshwater fish
• South America
• Large
• Tropical fish

The long-tailed river stingray or antenna ray (Plesiotrygon iwamae) is a species of freshwater stingray in the family Potamotrygonidae. It is found in the Amazon basin in South America, ranging from Ecuador to Belém. It lives in the main channel of the Amazon River and lower parts of its major tributaries.