Okay, I am not going to post my oppinion on this, just post the artical I found. Its fairly old, so don't go off on me.
"We homo sapiens are easily flattered. We like dolphins because they seem to like us. They smile--or rather, their mouths curve upward in an illusion of cheeriness--and we feel the urge to touch, to pet, to be nearer. It hardly registers that dolphins smile even when they have nothing to be happy about.
Luna died smiling. The bottle-nosed dolphin was captured off the southwest coast of Baja California. For two hours, she travled in a coffin-like trailer with virtually no water. When she arrived at her destination, an aquarium at La Concha Beach Resort in La Paz, Mexico, she was carried in a makeshift hammock and deposited on a sandy beach. She tried to bite her handlers, but her protests went unheeded. She was forced to frolic and swim with tourists in a pen. After five weeks. she died--from stomach inflammation and ulcers caused by stress, according to the autopsy report. A leading Mexican environmental oraginazation, the Group of One Hundred, is pressing for the release of Luna's seven traveling companions."
--Please don't post, I haven't typed all of the report yet. You can if you want, just know this isn't the whole thing.