The Gulf of California in Mexico is the home of the Munk's devil ray. It weighs about 20 kilograms but its width can reach over two meters. It sometimes shows a very unique behavior. A huge school of several hundreds of these devil rays amazingly jump more than two meters high over the sea surface again and again. But the reason of the jump is a mystery because very little is known about this species of fish. In fact they have been rarely observed. This program focuses on the mode of life of the Munk's devil ray to find the answers to their mysteries.