My husband and I went on the aquafest Tuesday tour which gets you 4 snorkeling sites for 4 hours at $35 USD per person, which is a great deal in grand cayman. We had a blast, the boat captain and his assistant were friendly, informative, and did a great job. There were 20 of us all ages from infant to 70 and everyone had a great time. You hit starfish reef, very shallow, good for kids, and a good refreshing dip for adults. Then on to feed the sting rays. They were very educational, did a great job taking photos, and it was one of those lifetime memorable events. Then on to 2 snorkel sites, lots of fish. Great time overall. They let you buy photos emailed to you for $40 for all, or $10 for one, but there was no pressure, and they had taken photos with your own camera as well. We bought the photos and tipped well, as it was a great experience.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.