There is the Dolphin in depth Program at the Living Seas Pavillion at Epcot,about 3,5 hours long and I think it´s about 150,-$.You learn how they work with the dolphins and go into the water with them,but no swimming.Check wdwig for more details,it´s somewhere on the site,but I don´t know the exact spot.My sister and I are oing to do this program nexr April(Christmas present from our parents,nice?!).Hope that helps.
Greetings from Germany
Conny°o°