Ushioni-buchi in Nishimuro County, Wakayama Prefecture, whose bottom was believed to have been connected to the sea, was said, "Ushioni is in it," when the water color became muddy.
和歌山県西牟婁郡の牛鬼淵は、底が海にまで通じており、淵の水が濁ると「牛鬼がいる」といわれた。