'Blackfish' Documentary Dives Into Killer Whale Captivity

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The documentary "Blackfish" traces the history of killer whales in captivity, culminating in a 2010 incident in which a 12,000-pound orca killed a trainer at SeaWorld in Orlando, Florida. Director Gabriela Cowperthwaite documents how such incidents happen when these massive animals are held against their will. Studies have shown that the giant marine mammals have human-like self-awareness, an ability to communicate and organize complex societies, making them similar to some great apes.