What is the mystery of the blue hole?

Scientists believe the cave formed during the last Ice Age, which ended about 14,000 years ago. The cave flooded and collapsed as the Ice Age ended and sea levels began to rise, leaving behind the Blue Hole we see today. Researchers also predict it won't be around forever.



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Biodiversity is one of the most important reasons why people want to see Great Blue Hole. In particular, this place is home to several shark species including Caribbean reef sharks, nurse sharks, hammerheads, bull sharks, and black tip sharks.

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The world's biggest ocean sinkhole is a popular attraction for divers, but at over 400 feet deep, the bottom has remained a mystery. During their trip, the team conducted over 20 dives with the aim of creating a 3D sonar map.

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The Diving Skills Needed for the Blue Hole You will need at least an Open Water or Advanced Open Water diving certification for this dive. Divers must be very comfortable in their gear, have excellent buoyancy control and be able to equalize easily. Good physical health is also required.

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Believed to be the world's largest feature of its kind, the Great Blue Hole is part of the larger Belize Barrier Reef Reserve System, a World Heritage site of the United Nations Educational, Scientific and Cultural Organization (UNESCO).

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Description. The Blue Hole is a clear blue body of water with a constant 62 °F (17 °C) temperature and constant inflow of 3,000 US gallons per minute (11 m3/min; 2,500 imp gal/min), enough to cycle out the water every six hours.

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The main big swimming hole when you first enter the park is absolutely deep enough to swim in. Divers have reportedly measured some spots as deep as 20 feet. But it's so freezing cold, between 50-60 degrees in the midst of summer, that you won't want to stay shoulder-deep for long.

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