A decades-long quest has culminated in the discovery of a 661-pound stingray in the Mekong River
expedition to Argentina, Hogan himself caught a short-tailed river ray weighing about 400 pounds. But he knew that the giant freshwater stingray of Southeast Asia could grow much larger than that.
More recently, Hogan’s Wonders of the Mekong project has accelerated research in northern Cambodia, where the Mekong River is lined with seasonally flooded forest, contains high biodiversity, and is believed to spawn up to 200 billion fish a year. The region is also thought to be an important dry-season refuge for many of the Mekong’s megafish, including giant stingrays.
After receiving Thun’s call, team members based in Phnom Penh, the Cambodian capital, raced to the riverbank. There, they were joined by another team of American scientists working in the area, who quickly implanted, at the base of the ray’s tail, an acoustic tag that researchers hope will help them learn more about the elusive species’ behavior, including where it feeds, travels, and gives birth to pups.
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