I was on the Magic in January and I went to St John snorkeling. I was disappointed. Maybe it was a bad day or something but we saw nothing! Maybe 2 or 3 fish in 2 hours, and they weren't even colorful! We did the Trunk Bay beach excursion, maybe you have to go on the one that takes you on the boat...that one was filled and we couldn't get in. I also went on CC, but no one told me to start over near the rental shack, so I didn't see much there either. But I bought my own equip, so I will try again in November! Good Luck...