One of the most important recreational and economically useful activities of Polynesian natives has been coastal diving (Ruku) and deep diving (Hangu Ika). Ruku is similar to today’s scuba diving, but without the technology of our days. Since childhood, the natives are taught this practice and hold competitions to demonstrate their abilities. They may carry spears and nets, but they are so skillful that they can catch lobster and even fish with their hands.