In 1982, frustrated by the limitations of observing dolphins in captivity, psychobiologist Rachel Smolker moved to a remote beach on the west coast of Australia, where "tame" wild dolphins often interacted with humans. By 1990, she and her fellow scientists could recognize over 250 individuals. This magnificent chronicle of their research reveals the inner workings of dolphin life, unravels many dolphin mysteries and profiles a wide range of individual dolphin personalities.