Tour description provided by Viator

Spend the day on Michaelmas Cay, a small sand island on the outer Great Barrier Reef. You'll cruise from Cairns aboard a luxury sailing catamaran, see the reef's brilliant coral and marine life from a semi-submersible submarine, try scuba diving or go on a snorkeling tour. Lunch on board is a delicious hot and cold buffet including prawns.

This full-day excursion from Cairns is ideal for nature lovers. Michaelmas Cay is a protected sanctuary for 27,000 migratory seabirds, and one of the most important nesting sites in the Southern Hemisphere. The surrounding Outer Reef is a breathtaking garden of exotic marine life, magnificent coral and giant clams. There are more varieties of fish here than in the entire Atlantic Ocean. The Cay is a protected seabird sanctuary playing host to over 20,000 migratory seabirds, one of the most important nesting sights in the Southern Hemisphere.The tour includes semi-submersible coral-viewing tours for those who want to see the underwater world without getting wet. If you would like to dive the Great Barrier Reef, introductory dives for novices are available.