Nautilus offers a version of its semi-submersible trip with the opportunity for 30 minutes of snorkel time added on top. The snorkeling happens at the same area of reef as Nautilus' diver feeds the fish. Cheeseburger Reef is one of the largest on the island and also claims itself as home to over 400 varieties of Fish and a large diversity of Coral life. All snorkel equipment is provided for as well as an in depth briefing from the crew.