tattoonicorn:

In Inuit mythology, Akhlut is a spirit that takes the form of both a wolf and an orca. It is a vicious, dangerous beast. Its tracks can be recognized because they are wolf tracks that lead to and from the ocean. Often, dogs seen walking to the ocean and/or into it are considered evil. Little is known of this spirit, other than that it shapeshifts from an orca to a wolf when hungry. Not many myths relate to this creature but a great number of myths tell of creatures that shift their shape. It’s normally portrayed as a mix of an orca and a wolf.

Interestingly, another name for an orca is seawolf, stemming from a time when it was believed that the ocean and the land shared variants of the same animals (hence the well-known seahorse and sea cow, as well as lesser known creatures such as the Monkfish and seabees.)
(Image source:http://magistream.wikia.com/wiki/Akhlut)