Grindylows are supernatural creatures that appear in the folklore of England, most notably the Lancaster area. They are described as diminutive humanoids with scaly skin, a greenish complexion, sharp claws and teeth, and long, wiry arms with lengthy fingers at the end. They dwell in ponds and marshes waiting for unsuspecting children, which they grab with their shockingly strong grip, and then drag under the surface of the waters.[4][5]
Grindylows have been used as shadowy figures to frighten children away from pools, marshes, or ponds where they could drown.[6][7]
A hostile race called the grindylow appear in The Scar, a novel by China Miéville. They are described as humanoid with grey-green mottled skin, large dark eyes, foot-long teeth and a single eel-like tail below the waist.
Evil aquatic monsters called grindylows appear in the Pathfinder Roleplaying Game.[11] They are depicted as small humanoids with shark-like heads, finned ears, clawed hands, and octopus tentacles in place of legs.
A grindylow is in the Jane Yellowrock series by Faith Hunter as well as the companion series called Soulwood. While they are still ravaging creatures of death, a young grindylow is cute like a green kitten and can be quite loyal to those who know it.