We decided to rent snorkel gear ($25/person) on Castaway and just hang out. We also decided to stay on the boat in Nassau to get some more time to explore the ship. We were on her maiden voyage, and we were disappointed that we didn't get to see/do everything. We're going to spend the Nassau time riding the Aquaduck, playing Midship Detective, etc.
My son & I rented snorkel gear last Sept on our Dream cruise. We loved it until we saw a shark! yes it was kinds young but it was still about 6 feet long! I told a couple of the lifeguards and they were aware. they said there was nothing to worry about as it was small. There was a hurricane a week prior and it came over the netting in the high waters. They said that a baracuda had gotten in also. That was pretty much the end of the fun for me & my son. I actually had my water camera in my hand at the moment but i was too panic-stricken to take a picture. After the fact, i was so mad that i hadnt taken a pic. So anyway, i dont think there will be any snorkeling this year for us.
we also stay on the ship in Nassau to enjoy the pool, aquaduck, and detective agency. Its nice because it's not too crowded that day!