An orca responsible for the death of his trainer had killed before the tragic events that unfolded in 2010.
Killer whales have been in captivity since the 1960s with the animals going on to become staples of resorts like SeaWorld and other similar aquariums.
Orcas can live anywhere between 50 to 90 years and, as a result, can find themselves in captivity for years on end.
Tilikum was one example of a killer whale that spent the majority of his life in captivity. He died in 2017 at the age of 35, having spent 34 years in resorts like SeaWorld.
The whale had an extremely troubled history, sparking the documentary Blackfish.
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