The giant freshwater stingray is the largest freshwater fish and stingray in the world. Giant freshwater stingrays are found in rivers in southeast Asia and Borneo. The giant freshwater stingray is fished for meat, sport, and for aquariums. Because of this, giant freshwater stingrays are endangered. Giant freshwater stingrays have a 15-inch stinging barb on their tail, capable of pericing through bone. in 2012, a DNA analysis reported that it was most closely related to the porcupine ray.