A Grindylow is a pale green underwater creature that live and reside in the weed beds at the bottom of many lakes in Great Britain and Ireland. It is known to have green teeth, pointy horns, and long fingers, which are used to pull prey to their deaths into the water. Grindylows are incredibly violent and aggressive towards Wizards, Witches, and Muggles, altogough Merpeople have been known to domesticate them and then keep them as pets.

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