Heliotrygon rosai, or Rosa's round ray, is a species of freshwater fish in the family Potamotrygonidae.

It is native to the Amazon basin (Marajó to Peru) in South America.

[1] Its maximum disc width is 80 cm (2.6 ft) and the stinger is greatly reduced, rendering it virtually harmless.

[1] It has not been evaluated by the IUCN red list.

This batoid-related article is a stub.