In the beautiful waters of Oahu Hawaii, a small barge sits around 65 feet below the surface, sunk in the 80s as an artificial reef. Turtles love this area, and are frequently seen resting on various surfaces of the wreck. This Hawaiian Green Sea turtle was floating by a O shaped structure, and it reminded me of the O rings that are used in pretty much every part of dive and camera equipment, to keep the water out.