For 14 years, John Hargrove was living his dream as an orca trainer, but once he became disillusioned by what he saw behind the scenes, he left the business. He’s now sharing his experiences in a new book, Beneath the Surface.

"I saw the devastating effects of captivity on these whales and it just really became a moral and ethical issue," he told NPR's Fresh Air. Watching calves leave their mothers was upsetting, he said, and SeaWorld "tries to be clever with semantics" by "redefining the word 'calf' by saying a calf is no longer a calf once they're not nursing with their mother anymore, and that's simply not true. A calf is always a calf." He added that the whales would know when they heard cranes that one of them would be taken away, and he would "hear extremely upset vocalizations from whales that are... being taken away, and then the whales that they're being taken away from."

Performing with orcas is no easy task, and Hargrove has suffered broken bones, lacerations, cartilage destruction, and the thickening of bones in his skull from spending so much time in cold water. "You're not effortlessly gliding through the water like most people think," he said. "It's like having two SUVs pushing you around and you're just on one foot." It wasn't the breakdown of his body that got him to leave, though — the "final straw," he said, was when veteran trainer Dawn Brancheau was dragged into the water and killed by a whale at SeaWorld in Orlando in 2010, and the company later said publicly "they had no knowledge we had a dangerous job.” For more of his candid interview, visit NPR. Catherine Garcia