"Hantu air" is a Malay term for a supernatural creature commonly known as a water spirit or a water ghost. While the term is specific to the Malay culture, several other synonyms refer to similar mythical beings across different cultures and beliefs. In Japan, for instance, "kappa" is a water sprite that plays pranks on humans. The Scottish have "kelpies," shapeshifting water creatures often appearing as horses, while in Ireland, "selkies" are seals that transform into humans. The Greeks also have their aquatic mythology, with "naiads" representing the spirits of freshwater streams, lakes, and other bodies of water. Despite the differences in names and characteristics, water spirits remain a fascinating part of folklore across various cultures worldwide.