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We used dolphindiscovery.com last year and it was wonderful. We did the dolphin swim and there were two dolphins that pushed and pulled you through the water. You kissed them and did tricks with them. They limit the group to 8 people so everyone gets enough time with them. And yes, they did sell a video and pictures and t-shirts, but we didn't feel pressured to buy. We wanted all that stuff to remember a wonderful time. It was awesome...best thing we did on the entire trip!!! I highly recommend it!!