Genetic Adaptations in the Haenyeo

• 08 May 2025

Source: TH 

The Haenyeo, a group of women divers from South Korea’s Jeju Island, have been found to exhibit both genetic adaptations and physiological changes related to their unique diving practices. 

• Long-term diving practice and natural selection have shaped traits like bradycardia (slowing of heart rate), blood pressure regulation, and cold tolerance. 
• About Haenyeo: They dive up to 10 meters underwater to harvest shellfish like abalone and sea urchins for a living, without the use of oxygen masks. 
  • Their culture has been recognized by UNESCO as part of the Intangible Cultural Heritage since 2016. 
• About Jeju Island: It is a volcanic island (made of basalt and lava) in South Korea, and home to the country's tallest mountain Hallasan (dormant volcano, 1,950 meters). 
  • The Jeju Volcanic Island and Lava Tubes are a UNESCO World Heritage Site, known for their unique geology and 360 satellite volcanoes around the main volcano. 

Read More: UNESCO's List of Intangible Cultural Heritage (ICH)