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.<br/> <br />Director Gabriela Cowperthwaite documents how such incidents happen when these massive animals are held against their will.<br/> <br />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.<br/> <br />SOUNDBITE Director Gabriela Cowperthwaite saying (English):<br/> <br />"So in my mind a killer whale, a scary intelligent animal, why would it bite the hand that feeds it. So I kind of went in trying to investigate that question as a mother who took her kids to SeaWorld as someone who didn't come from animal activism. I just wanted to investigate that incident. Peeling back the onion from that incident is what led to making this movie."<br/> <br />"Blackfish follows the orca involved in the incid
