They call him Flipper, maybe. Actually, many or most of the bottlenose dolphins at the show at the National Aquarium in Baltimore are female, as are all the trainers who swim with them in the half-hour show.
I wondered, as I watched the show (sitting in the bleachers high enough to be above the “splash zone” ) about the movie “The Cove”, which I reviewed on my movies blog Aug. 7, 2009.
The dolphins dumped and engaged in some P.E. tumbling, and let the trainers ride dolphinback. The tank asks visitors not to tap, as the dolphins are easily distracted.
The National Aquarium (link) does offer the public many conservation and sustainability tips as part of the show, particularly about water and Chesapeake Bay pollution.
Apart from chimpanzees, dolphins are among the most intelligent of all animals (especially orcas, or killer whales). Their sound system seems to be a whole language which we have not completely decoded. They are actually mammals that returned to water for food supply. They breathe air, and can hold their breath an extremely long time and sleep while doing so.
Here is a fact sheet on dolphins.
There is a lot more concern now about abuse of dolphins. See my reviews of the films "The Cove" (Aug. 7, 2009) and "Blackfish" (July 29, 2013) on the Movies blog.