Ningens are an old internet legend/creepypasta.
Supposedly living in the polar regions of the globe, these creatures are described as having white-skin, a roughly humanoid structure with clear head, long arms and even hands and finally: a size range of 15-20 meters, perhaps way bigger. So basically humanoid whales? There is not much info besides that so their diets, behaviour, intelligence, etc are open.
Probably just another fake internet cryptid story. But still, I'm curious about implementing the concept in a work of mine. I would like to know:
-Are such creatures even plausible?
-Could they exist in a world similar to ours?
-What could be their evolutionary origin and what natural niches could they occupy?