Umi nyōbō are dangerous yōkai who live in the ocean. They resemble human women, but have many piscine features. Their skin is scaley like a fish, and their fingers and toes are webbed like a waterfowl’s and resemble fins. Their teeth are sharp and brilliant, like a shark’s. They are very strong, and very dangerous. umi nyōbō as fearsome predators who kill and eat humans for pleasure. But they can also be nice and compassionate. Umi Nyōbō are the spirits of drowned woman who died at sea.