There was once a tribe of humans that was referred to as “the Wild Ones.” They were humans who were linked to the wild natural world, having animal characteristics.
This man looks like no one to be trifled with, and that assessment is correct.
The heroes are travelling the great seas by ship. One night when the seas are calm and everything seems fine their vessel is eaten by a great whale. The end? No. They wake in the belly of the animal, it is like a great cave. Full of wrecked ships and strange things to be discovered. Will they make it out alive?