Ring of Light

In The Wind Waker, sometimes at night small rings of light can be seen floating on the surface of the water. As The King of Red Lions approaches the ring it begins to fade and is soon unseeable. When you are close to a ring of light you will hear a soft sound the will become stronger and weaker depending on how close you are to exact spot the ring of light was. Once you think you are on the correct spot, you can use the Grappling Hook to reach under the waves and pull up a secret treasure.