By Grace Tsoi BBC News Image source, Wonders of the Mekong Image caption, Scientists state the 300kg stingray is the biggest freshwater fish ever tape-recorded A 300kg (661lb) stingray captured in the Mekong river in Cambodia is the mostsignificant freshwater fish ever recorded, researchers state. It unseated the previous record-holder, a 646lb (293kg) Mekong huge catfish captured in Thailand in2005 There is no authorities record-keeping or database of the world’s greatest freshwater fish. The Mekong is abundant in biodiversity however overfishing, dams and contamination threaten its vulnerable environment. It streams from the Tibetan Plateau through China, Myanmar, Thailand, Laos, Cambodia and Vietnam. “In 20 years of investigating giant fish in rivers and lakes on 6 continents, this is the biggest freshwater fish that we’ve cameacross or that’s been recorded anywhere worldwide,” stated Zeb Hogan, a biologist who leads Wonders of the Mekong, a USAID-funded preservation task. “Finding and recording this fish is amazing, and a unusual
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