I swam with the dolphins in the Keys and absolutely loved it. I wouldn't hesitate to do it again. And I paid $125. But we were in 22' deep water and actually swam with them. They did tricks with you. We were able to hold onto the fins of two of them and they pulled you across the lagoon. Go for it.
If anyone has any questions you can email me.
till Mariner of the Seas (Western Caribbean)