Tilikum, the orca whale who had been part of SeaWorld's community for the last 25 years, has died at 36. He rose to infamy after killing a trainer at SeaWorld before becoming the basis of a controversial documentary about the marine theme park. Tilikum was the subject of 2013's "Blackfish," which explored the care of orcas in captivity. The cause of Tilikum's death has not yet been released. The orca was born off the coast of Iceland and moved to Sealand of the Pacific after being captured.