A new species of a giant Amazonian fish has been identified in tropical South America, according to a report in the journal Copeia. Arapaima leptosoma is the first new species of the freshwater fish arapaima, which can reach lengths of up to 10 feet and weigh more than 400 pounds, identified since 1847. The new species is thinner, has a horizontal black bar on its head that's a unique set of sensory organs, said Donald Stewart of the SUNY College of Environmental Science and Forestry.

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