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.
The hard-hitting film documents the controversial captivity of killer whales, and its dangers for both humans and the species - looking at Tilikum specifically.
The large mammal was captured in Iceland in 1983 before being shipped off to Sealand of the Pacific near Victoria, British Columbia, Canada, shortly after.
It's said that Tilikum was kept in a tank with two larger female orcas and they'd regularly attack the young whale.
But they went on to turn their aggression towards Keltie Lee Byrne, a 20-year-old trainer at the resort, after she slipped into their tank.
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