The Bad News
Unfortunately the Snorkeling Cruise was one of several events not sponsored so it will not be available.
The Good News
On Sunday we do have the Golf Tournament, Bacardi Rum Factory and city tour, and my favorite; Deep Sea Fishing. Additionally Atlantis does offer snorkeling , dolphin, shark and stingray encounters and full scuba diving that you can purchase directly so its an available option if you want to spend some time on the reefs.