But criticism over keeping them captive grew after an orca named Tilikum grabbed trainer Dawn Brancheau after a "Dine with Shamu" show and pulled her into the pool, killing her. That death in 2010 was highlighted in "Blackfish." Tilikum, who was also involved in the deaths of two other people in the 1990s, is now very sick. He has been at SeaWorld Orlando for 23 years.