Marineland and all places like it are the same. We nearly got thrown out of a holiday resort in Mexico once as my wife left some leaflets about the swim with dolphins cruelty laying around.
Here's the funny thing...every holiday I go on we usually find a local with a boat and pay him a few dollars to take us out to see the dolphins in the wild. We did this with a few others once and one guy on our boat asked if he could swim with the wild dolphins...the boat owner said "sure, if they want to swim with you" which I thought was the most poignant thing that I've heard on this subject. Short story...he swam with wild dolphins and the whole thng was amazing. The captive thing is just sad and people who say "but look, they are smiling" are very mistaken.
Anyway, I would encourage more of you to ask to see dolphins in the wild. The more that do this and the less the captive businesses get customers then the better this will be for the animals. Most local fishermen know where the dolphins hang out and once you see them in the wild you'll never want to see them in a large tank again. Did I mention that it costs way less than the swim with captive dolphins stuff too?