The each-uisge (commonly called a kelpie) is a creature of Scotland's lochs and seas that disguises itself as a beautiful horse or a handsome man to lure people in. Once a rider mounts, the skin clings fast and will not let go, dragging the victim down into the deep, where all is devoured but the liver.
As a drowning-trap that fuses seduction with adhesion, it is the archetype of the waterside uncanny — approaching in its most alluring form and leaving no escape.