Pal Rai-Yuk
In Inuit traditions, the Pal Rai-Yuk is a water creature that lives in the estuary swamps and rivers of Alaska. It has two heads, two tails, six legs, three stomachs and a sharp ridge running along its spine. Inuit hunter would paint the image of Pal Rai-Yuk upon their canoes before fishing in order to avoid its attention.
John and Caitlin Matthews, The Element Encyclopaedia of Magical Creatures, 2013, Pal Rai-Yuk, p 363