Blackfish is a 2013 documentary film directed by Gabriela Cowperthwaite. The film premiered at the 2013 Sundance Film Festival on January 19, 2013, and was picked up by Magnolia Pictures and CNN Films for wider release. The documentary focuses on the captivity of Tilikum, a killer whale involved in the deaths of three individuals, and the consequences of keeping killer whales in captivity. Wikipedia