
The Boiuna (translated as "Black Snake") is a legendary creature found in Brazilian mythology. It is also known as the Cobra-Grande (translated as "Large Serpent") and the Mboiaçu.
The Boiuna is a nocturnal, snakelike creature with reflective skin, considered the most powerful denizen of the rivers within the Amazon rainforest. It is said to have the ability to take on various shapes as a means of luring its prey, or as a means to frighten off any fishermen that venture into its territory.[citation needed] Among the forms into which the Boiuna can transform are canoes, steamboats, sailboats, and women. According to conservation biologist Beatriz Cosendey, the green anaconda has a "major role in legends including the 'Boiuna' and the 'Cobra Grande'".
... assuming a serpent shape, huge and dark that swims as though it were a big trunk. It is able to morph in to a canoe, a sail boat, a transatlantic and more seldom in a woman. ...The Boiúna simply owns the river.Deprecated link archived 13 October 2013 at archive.today