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Olive Ridley Turtle

April 26, 2026

Olive Ridley turtles from Tamil Nadu have begun migrating towards the Sri Lanka Dome, a little-known but highly productive ocean region.

About Olive Ridley Turtle:

  • It is one of the smallest and the most abundant of all sea turtles found in the world.
  • It gets its name from the olive green colouration of its carapace (shell). 
  • It is best known for its unique mass nesting, called Arribada, where thousands of females come together on the same beach to lay eggs.
  • Distribution:
    • They are mainly found in the warm waters of the Pacific, Atlantic, and Indian oceans.
    • Odisha’s Gahirmatha Marine Sanctuary is known as the world’s largest rookery (a colony of breeding animals) of sea turtles.
  • Features:
    • They are omnivorous, meaning they feed on both plants and animals.
    • They are solitary, preferring the open ocean.
    • These turtles spend their entire lives in the ocean, and migrate thousands of kilometers between feeding and mating grounds in the course of a year.
  • Conservation Status:
    • IUCN Red List: Vulnerable
    • CITES: Appendix I
    • Wildlife Protection Act, 1972: Schedule 1

What is the Sri Lanka Dome?

  • It is considered one of the most productive regions in the Indian Ocean.
  • Formation: It is formed by seasonal upwelling that brings cool, nutrient-rich waters to the surface, triggering plankton blooms that attract turtles, fish, whales, and seabirds.
  • This phenomenon typically begins in May, peaks in July, and declines by September, after which the turtles disperse and begin their return migration.

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