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11 largest freshwater fish in the world

By: Bryan Nelson on Oct. 4, 2010, 11:50 a.m.
Giant freshwater stingray

Photo: Zeb Hogan via National Geographic

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Giant freshwater stingray

These frightening freshwater fish can grow to massive sizes, with some weighing in excess of 1,000 pounds and measuring nearly 15 feet across.

Found in the rivers of Southeast Asia, they have a serrated spike on their tails which can measure 15 inches long and is capable of piercing bone -- not the sort of thing you want to swim with.

Unfortunately, though, like many of the unique river species endemic to Southeast Asia, the giant freshwater stingray is critically endangered due to fishing and the construction of dams.