In Western Australia, these dolphins have taken on an even tougher challenge. The fish have taken refuge close to the beach where the water is only a few centimeters deep. Tail-slapping is a method dolphins often use to stun their prey, but it doesn't seem to work here. The fish are tantalizingly close, but they're still out of reach. So the dolphins try another technique. Vigorously pumping their tails, they work up some speed and then they hydroplane. Their momentum carries them right through the shallowest waters and onto the fish. Now they're in real danger of being stranded. But fortune favors the brave. Younger dolphins lie alongside, watching. But, so far, only eight individuals here have mastered this daring technique.