The term “water horse” was originally a name given to the kelpie, a creature similar to the hippocamp, which has the head, neck and mane of a normal horse, legs like a horse, webbed feet, and a long, two-lobed, whale-like tail. The term has also been used as a nickname for lake monsters. Kelpie, or water kelpie, is the Scots name given to a shape-shifting water spirit inhabiting the lochs and pools of Scotland. It has usually been described as appearing as a horse, but is able to adopt human form.