I don't know if this will help at all.... I've only swam with dolphins once and it was in Cozumel about 3 years ago. We booked through carnival and it was about $100 per person. We kind of stood around on an underwater platform and the dolphin swam by several times, we got to pet it and then take a picture kissing it. It seemed like a lot of hype and not much anything else. It was ok, but way overpriced and very generic. I've heard other people say good things about swimming with dolphins in Cozumel and other places as well. I think that the place matters less than the program you sign up for. Sorry not to be of more help. I guess the best thing you can do is compare prices and programs and shop around. Happy sailings!
We are booked in June for the dolphin Discovery out of Cozumel. Carnival offers one, but like above says, it is standing around. By booking straight through the company, we are doing the whole thing, ride, feed, swim. It is 139.00 person. It is called the Royal Swim
Click here: Cozumel Mexico Dolphin Swim - Swim with dolphins in Dolphin Discovery Cozumel at the Chankanaab Marine Park This is the site for the park really close to the dock in Cozumel. We booked it ourselves, took a taxi and saved some money. Worked fine. I was sorry that I didn't take my water shoes, though, because the platform in the water where you stand is made of metal pipes and it about killed my feet. Hope this helps, have a good time.