Camaueto

A creature from the folklore of the inhabitants of Patagonia and the Chilean archipelago.

It is an incredibly strong beast, resembling a horse or bull, but with strong claws and fangs. A new individual grows out of the horn of an adult kamaueto planted in the ground. He is born necessarily in fresh water, and as an adult he lives in the sea. When he moves into it by the river (on a hurricane night), heart-rending sounds are heard. It sinks ships and eats up the entire crew.