If you haven't swam with dolphins, you must do it! I would suggest going to Mexico for this. We did it in Playa Del Carmen in Xcaret and its called Delphinus Riviera Maya. It was only $120 per person. We got the dream couples swim, so you basically swim with the dolphins more like about 1.5 hours. I wouldn't do the group one, you only stay on the dock and don't really swim with them at all. We wanted to do them in Florida, but it was like $320 to do it. The Mexico one is great!
If you want to do a once in a life time deal, I would do this! I'm not going to do it again, but it was a great once in a life time event. These dolphins were so cute and so sweet!
Hope you enjoy the photos and you are able to do these when you're in Mexico.