Dawn Therese Brancheau was an American animal trainer at SeaWorld. She worked with orcas at SeaWorld Orlando for fifteen years, including a leading role in revamping the Shamu show, and was SeaWorld's poster girl. She was killed by an orca, Tilikum, who was also involved in the deaths of Keltie Byrne and Daniel P. Dukes.

Shamu was the stage name used for several performing orcas at SeaWorld as part of their theatrical Shamu show beginning in 1960s. The original Shamu died in 1971, but the name was trademarked by SeaWorld, and has been given to different orcas over the years.