Transporting marine mammals, like dolphins, can be even more complex and risky. In January, a 33-year-old dolphin died just after being moved to SeaWorld Orlando.
"Whenever you move exotic animals it is stressful." Ron Kagan, director of the Detroit Zoo, told The Dodo last year. "And that is one of the biggest challenges for any zoo ... Whether it's an elephant or a tiger or a frog, every move has an element of stress, and some are bigger than others."
People turned to social media to express their sorrow for Bantu, many referring to Harambe, another gorilla who died earlier this year after a toddler climbed into his enclosure at the Cincinnati Zoo.
Gorillas can live into their 50s. But Bantu died in the zoo where he was born.
"This incident has caused great consternation among zoo personnel who cared for him for nearly 25 years," the zoo's statement on Bantu's death said.