Blackfish doc looks at SeaWorld’s captive orcas

What the Oscar-winning 2009 documentary The Cove did for dolphin slaughter in Japan, Blackfish may do for killer whales living in captivity while performing at marine parks. Blackfish, explores what may have caused Tilikum, a 12,000-pound orca, to kill three people, including veteran SeaWorld trainer Dawn Brancheau in 2010.

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