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Tilikum, Orca That Killed SeaWorld Trainer, Died From Bacterial Pneumonia

Tilikum, the orca that killed Dawn Brancheau, was profiled in a documentary that swayed public opinion against keeping the whales in captivity.
Image: Killer whale \"Tilikum\" appears during its performance in its show at Sea World
Killer whale "Tilikum" appears during its performance in its show at Sea World on March 30, 2011 in Orlando, Fla.Gerardo Mora / Getty Images

ORLANDO, Fla. — SeaWorld officials say Tilikum, the orca that killed a trainer at the company's Orlando park, died from bacterial pneumonia.

SeaWorld spokeswoman Aimée Jeansonne Becka announced the results of a necropsy in an email Friday.

Tilikum had been receiving treatment for a persistent bacterial infection when he died Jan. 6. He was estimated to be 36 years old.

Tilikum was profiled in the documentary "Blackfish," which helped sway popular opinion against keeping killer whales in captivity at SeaWorld parks.

Criticism over keeping orcas captive grew after Tilikum grabbed trainer Dawn Brancheau in 2010 after a "Dine with Shamu" show and pulled her into the pool, killing her. Tilikum was also involved in the deaths of two other people in the 1990s.

As SeaWorld's most prolific male orca, Tilikum sired 14 calves in the nearly 25 years he was in Orlando.