For fishermen on the Ayeyarwady River in Myanmar, the key to a good day?s catch isn?t bait or tackle; it?s a dolphin. The Irrawaddy dolphin has a knack for herding fish into nets; and that knack can increase the size of the fishermen?s catch by threefold. In turn, the endangered dolphins are paid for their services with a fish dinner—and, more important, the friendship of their human neighbors and guardians. This unique cultural tradition protects both a critically endangered wildlife population and a sustainable, local livelihood.