Welcome aboard, Howard! It sounds like you have a magical sailing with Disney Cruise Line coming up! You didn't mention which ship or itinerary you'll be sailing, but I saw in your notes that you posted when you asked this question that your arrival date is Saturday, August 9. If that is indeed the day you set sail, then you must be heading out on the Disney Fantasy's seven-night Eastern Caribbean cruise! What an amazing itinerary with stops in some gorgeous ports of call!
Disney Cruise Line offers a really fun dolphin interaction experience on the
Tortola Dolphin Encounter during the port stop in St. Thomas/St. John. While I haven't experienced that exact dolphin swim, my daughter and I did take one of Disney Cruise Line's Port Adventures to swim with the dolphins in Nassau last year and had a really wonderful time. It was the adventure of a lifetime for her! You can read more about the Tortola Dolphin Encounter on Disney Cruise Line's webpage.
Then, once your window opens for
online check-in (75 days prior to sailing for first time Disney cruisers, 90 or more days prior to sailing for those who have cruised with Disney before), you can begin to select your Port Adventures and other extras like Adult Exclusive Dining and Spa Treatments.
I hope those details help as you continue to plan your cruise, Howard! Let me know if you have other questions before you set sail! I'm happy to help!