The freshwater whipray (Urogymnus dalyensis) is a little-known species of stingray in the family Dasyatidae, found in a number of large rivers and associated estuaries in northern Australia.

Until recently, this species was regarded as a regional subpopulation of the similar-looking but much larger giant freshwater stingray (U. polylepsis) of Southeast Asia.

Morphological and molecular phylogenetic studies have since found that this species is in fact distinct from U. polylepsis, and it was formally described by Peter Last and B. Mabel Manjaji-Matsumoto in a 2008 Commonwealth Scientific and Industrial Research Organisation (CSIRO) paper.

[2] The only Australian stingray confined to fresh and brackish waters, the freshwater whipray has been thus far been reported from the Daly, Fitzroy, Gilbert, Mitchell, Normanby, Ord, Pentecost, Roper, South Alligator, and Wenlock Rivers in northern Australia, and may well inhabit most large, tropical Australian rivers.

[2] The freshwater stingray has an apple-shaped pectoral fin disc approximately as wide as long, with the leading margins almost straight and transverse.

It feeds on small fishes and shrimps, and has been observed lunging up riverbanks and taking prey caught in its wash.[4] There is a male specimen on record that was adolescent at a disc width of 88 cm (35 in).

However, there is concern that the South Alligator River subpopulation in Kakadu National Park may be negatively affected by contaminants from exploratory uranium mines upstream.