|"As unpredictable—and probably just as controversial—as UFOs, Leyak are a supernatural phenomenon most feared by many Indonesians."|
"Flæðarmús", or "the tide mouse", mostly dwells on the ocean floor, preferably at great depths.
It is shaped like the field mouse, only larger. The tide mouse needs silver (some say gold) in order to survive, and it only comes ashore if great tidings are afoot.
Good fortune awaits those who succeed in capturing a tide mouse. They must immediately place it in a waterproof container, pour seawater over it and put a silver (or gold) coin in the container. A day later, another coin of equal value will have appeared alongside it. The coin that was placed in the container is then removed, and this procedure is repeated once every day. One must remember to change the creatures seawater daily.