Blue Hole

  • World’s second-deepest blue hole, around 900 ft deep, was discovered in Chetumal Bay, off the coast of Yucatan Peninsula in Mexico.
  • It has been named Taam Ja’, which means ‘deep water’ in Mayan.
  • The world’s deepest known deep hole was discovered in the South China Sea in 2016, and is known as the Dragon Hole or Longdong.
    • As per the records, it’s 987 ft deep.

About Blue holes

  • Blue holes are large, undersea vertical caves or sinkholes found in coastal regions.
  • Many contain a high diversity of plant and marine life, including corals, sea turtles and sharks.
  • Blue Holes are found on coastal karst platforms around the world.
  • They are believed to have been formed in the Ice Age around 11,000 years ago, when the sea level was as low as 100–120 m lower than current levels.
  • Blue holes typically contain tidally influenced water of fresh, marine, or mixed chemistry.
  • Their water circulation is poor, and they are commonly anoxic(oxygen deficient) below a certain depth.
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