This creature resembles a hairless humanoid with smooth, slick skin; its hands and feet are webbed and end in claws, and its face has large, dark pupilless eyes. It has no noses or ears, and its small fish-like mouth is filled with tiny, sharp teeth.
Speed 10 ft., swim 80 ft.
Str 22, Dex 17, Con 24, Int 5, Wis 11, Cha 10
A gray nisp can notice creatures by scent in a 180-foot radius underwater and can detect blood in the water at a range of up to a mile.
Gray nisps can survive out of water for 1 minute per 2 points of Constitution. After that they begin to drown as per the drowning rules.