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Blue holes are underwater caves of great depth, common in Belize, the Bahamas and the Yucatan Peninsula.
There are caves that were created in limestone rocks because of rain in the ice age, when the sea level was lower than it is now.
Later, the Earth began to heat up and climbed the sea level, covering these holes.
Blue holes are nearly circular, very steep walls, and owe their name to the so marked contrast between the dark blue of the deep sea and the lighter tone of the shallow waters to its around.
Because of its depth and its configuration it close, the replacement of water in its interior is very slow, which makes mostly deeper areas poor in oxygen, allowing the life of bacteria and few others very adapted to these conditions.
Look at that spectacular are the Bahamas from the sky, with its hundreds of Islands and the incredible colours of the sea.
Sirocodiez sailboat, made a stop in Clarence Town, Long Island in the Bahamas to visit the Dean´s Blue Hole, the deepest blue hole in the world, of 202 meters deep.
We started the trip through this wild and lonely coast.
We found a bottle with a message of an Australian boat.
It hurts! He is not a treasure plane and arrived at the blue hole. Today we are privileged unique visitors.
Quickly we want to feel the sensation of diving in this impressive place.
The contrast between the turquoise and dark blue is overwhelming.
The few inhabitants of Long Island elude this site considered evil and terrifying.
Dean´s blue hole is held annually the free diving World Championship. The diver made the descent and the ascent without weight or fins following a rope.
The record of descent was established in 121 meters in 2011.
This sport is only suitable for divers off the charts. During the descent and ascent, the apneista sets 5-minute battle against a hostile environment.
From the 30 meters the human body not already floats and begins a vertiginous free fall into the abyss.
The heart slows down to about 15 beats per minute, and the lungs are compressed by enormous pressure.
The rise is far more dangerous. In the blood there is more CO2 to oxygen and the Agency is on the verge of collapse.
The continuous Sirocodiez their sailing towards new adventures I say goodbye and I hope you like this video http://www.sirocodiez.com/