Potamotrygon motoro (National Aquarium in Washington, D.C.)

描述：

Description: Ocellate river stingray (Potamotrygon motoro). Date: 20 July 2008, 14:27. Source: Flag Cichlid (Mesonauta festivus) Uploaded by Magnus Manske. Author: Cliff from Arlington, Virginia, USA. Camera location38° 53′ 40.55″ N, 77° 01′ 56.56″ W View all coordinates using: OpenStreetMap 38.894598; -77.032379.