Fig. 7. (a) Schematic description of the swimming process of dolphins. Leap, burst, and coast as a fast dolphin sailing a loop. Reproduced from ref. 101 with permission from Oxford University Press, copyright 2002. (b) The speed diagram corresponding to the above picture. The dolphin leaps out of the water at a speed of U_f. When hopping into the water, the speed maintained is also U_f, to a shallow depth, and it begins to coast horizontally and gradually slows down until it reaches U_i, and then rapidly bursts to U_f to start the next round of leaping. Reproduced from ref. 101 with permission from Oxford University Press, copyright 2002.