When two fellow trainers were killed by orcas in marine parks, John Hargrove decided that SeaWorld's wildly popular programs were both detrimental to the whales and ultimately unsafe for trainers. After leaving SeaWorld, he became one of the stars of the controversial documentary "Blackfish" and now contributes his expertise to an advocacy movement that is convincing both federal and state governments to act. In BENEATH THE SURFACE, Hargrove paints a compelling portrait of these highly intelligent and social creatures.