Environment & Biodiversity

Taam Ja: The World’s Deepest Blue Hole

  • Researchers in Mexico discovered the world’s deepest blue hole, known as Taam Ja’ Blue Hole (TJBH).


  • Taam Ja’ Blue Hole (TJBH) is the world’s deepest known sinkhole, measuring at least 1,380 feet (420 metres) below sea level.
  • It is located in Chetumal Bay, off the southeast coast of the Yucatan Peninsula.
  • It was discovered in 2021 and was initially estimated to be 900 feet deep.
  • This discovery beats the previous record holder, the Sansha Yongle Blue Hole in the South China Sea, by an astonishing 480 feet. 

Research Expedition and Findings

  • Scientists used a conductivity, temperature, and depth (CTD) profiler to gather information on the environmental conditions inside the blue hole.
  • Despite reaching depths of 1,640 feet (500 metres), the CTD profiler was unable to reach the bottom of TJBH, demonstrating its incredible depth.
  • Data from the profiler showed the presence of many water layers within the blue hole, with conditions similar to those found in the Caribbean Sea at depths below 1,312 feet (400 metres). 

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