Uminaoshi

Description
The Uminaoshi are a mass of glowing tendrils which feed on the time you have been alive, and sends the person back to an embryonic stage so they can be reborn.

They are found underwater trenches. They dont come out when the moon is visible, and on a full moon they release the embryonic eggs back to the water surface. If one swallows these eggs then the child in the embryo can be reborn.