Pirarucú – Amazon’s Giant Arapaima November 27, 2019December 2, 2019 moldychum Pirarucú is a native term for arapaima, the ancient, air-breathing, giant fish of Amazonian rivers and lakes. One of the largest freshwater fish in the world, the pirarucú can grow up to 10 feet long and can weigh up to 485 pounds.
