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There's plenty to see under the sea in the Cayman Islands, and you don’t have to get wet to experience it.

Nestled in the deep blue of the western Caribbean Sea, the Cayman Islands is surrounded by an incredibly diverse and extensive underwater world, thanks to its unique setting and geography. Any visitor wondering what to do in the Cayman Islands should definitely explore the wonders beneath the waves.


One unique aspect of the waters around the Cayman Islands is the exceptional visibility, often 30m (100ft) or more. There are no rivers or heavy agriculture in the Cayman Islands, meaning there is no silt or fertilizer runoff from the land into the sea. Result: some of the clearest marine waters anywhere on earth.


Another unique aspect is the Cayman Islands' reefs are unusually close to deep ocean water. The landmass that makes up the Cayman Islands is actually the peaks of an undersea mountain range, the Cayman Ridge, that flanks the Cayman Trough, 6,000m (20,000ft) deep and just 6km (3.7mi) offshore.


This all makes up to a destination with a world-class reputation of marine paradise full of amazing sights and wonders. With water temperature ranging between 26-28°C (78-82°F) all year round, snorkeling and scuba diving are hugely popular activities in the Cayman Islands with tourists and locals alike.


But what if you don’t, or can’t, snorkel or dive? Perhaps you have small children with you, or maybe you want the underwater experience without any effort or hassle? After all, you’re on holiday to relax! So why not explore the depths in a submarine on a Cayman underwater tour, an unforgettable experience that ranks as one of the top tourist activities in the Cayman Islands.


A submarine dive in the Cayman Islands gives you a safe and comfortable close-up view of the world up to 30m (100ft) beneath the waves. There is no shortage of marine life to watch. There are up to 1,000 species of fish in the Caribbean Sea, including flying fish, snapper, parrotfish, yellowtails, stingrays, moray eels, tarpon, the Atlantic Goliath grouper, and many others. There are four species of sharks (bull sharks, tiger sharks, silky sharks, and Caribbean reef sharks) and 90 species of mammals, including sperm whales, humpback whales, and dolphins.


The shallow reefs are home to crustaceans, invertebrates, nudibranchs, anemones, massive sponges and star corals. Turtles are quite common (there is a hatchery in Grand Cayman). There are also eagle rays, barracuda and lots of tropical fish, which you might find in a saltwater aquarium, including sergeant majors, damselfish, grunts, butterflyfish, angelfish, and yellowtail snappers.


Once you’ve seen the underwater world from a submarine during the day, you’ll definitely want to try it again at night. The difference between a day and a night underwater Cayman tour is ... well ... like the difference between night and day. No two visits to the depths are ever the same, with so much going on and so many different things to see. Exploring the reefs by submarine in the daytime is an unforgettable experience, but when night falls, all the nocturnal feeders are active. Watch out for octopus, crabs, lobsters, and coral with their polyps open and feeding.


Best of all, with a Cayman Islands Submarines dive tour, night or day, there’s no effort required and you don't even have to get wet to enjoy it.