A Water nymph (Naiad or Nereid) is a female spirit of the sea in Greek mythology, typically associated with a particular small body of water (e.g. creeks, lakes, rivers). Other nymphs, always in the shape of young maidens or 'teenagers', were part of the retinue of a god, such as Dionysus, Hermes, Pan, or a goddess, generally Artemis. They have no tolerance for campers littering.