Nova, I am just now finishing up Ric O' Barry's book about his years of training the "Flipper" dolphins, and then subsequently becoming an anti-captivity activist. There were about 6 or so dolphins who portrayed Flipper in the series.......all of them female, by the way. Ric heart-breakingly writes about one of them who did indeed commit suicide as she was so unhappy and lost her will to live. The more I learn about cetaceans, the more I want to know. What amazing animals! What a horrific crime to keep these sensitive, intelligent, and sentient beings held captive, to perform for the masses and line the pockets of corporations like SeaWorld and Loro Parque!
Based on the article I read, the "Flipper" who committed suicide was the "main" Flipper, who had done most of the stunts and close-ups. You can let me know if that is true, based on the book you are reading.
I was watching a commercial for the Atlantis resort in the Bahamas and they offer dolphin shows and "swim with the dolphins" activities. And I got to thinking about our local zoo, called "The Living Desert". (I live in Palm Springs, in the Southern California desert.)
The zoo features desert animals from around the world and most predators are kept in captivity. But in their live show, they use our local desert hawks WITHOUT EVER CAPTURING OR CONFINING THEM! The hawks learn when the shows are held, swoop down from the surrounding mountains in response to a visual signal, and do tricks for easy treats.
They say sometimes a hawk will disappear for a few months and then return and resume doing shows as if there had been no interruption. They don't always know why s/he left or where s/he went.
Surely dolphins are smart enough to do the same! If instead of tanks, they had open-to-the-sea pools, they would quickly learn that free fish were to be had for jumping through a hoop, etc. Some would no doubt disappear at times for mating, etc., but mothers with young might well learn to appreciate the easy meals.
It wouldn't be the Disney-fied Shamu show, but it might be even more interesting. (When a hawk flies down from a distant mountain and lands on a trainer's arm, it is really something!)