Why in News? 

  • The annual breeding and mating season for Olive Ridley turtles has begun along India’s coastline, with record-breaking mass nesting (Arribada) recently observed in Odisha and new hatcheries established in Goa and Tamil Nadu.

About Olive Ridley Turtles

  • Smallest & Most Abundant: These are the smallest and most populous sea turtles in the world. They get their name from the olive-green color of their heart-shaped shell (carapace).
  • Unique Nesting (Arribada): They are famous for Arribada (Spanish for “arrival”), a unique synchronized mass nesting behavior where thousands of females converge on the same beach to lay eggs.
  • Major Indian Rookeries (Odisha): 
    •  Gahirmatha Marine Sanctuary: The world’s largest nesting ground.
    • Rushikulya River Mouth: The second largest nesting site in India.
    • Devi River Mouth: Another significant mass nesting beach.
  • Migration & Navigation: They migrate thousands of kilometers between feeding and breeding grounds. They use the Earth’s magnetic field and solar cues for navigation to return to their natal beaches (Philopatry).
  • Diet: They are omnivorous, feeding on jellyfish, snails, crabs, and shrimp, as well as algae.
  • Conservation Status:
    • IUCN Red List: Vulnerable.
    • CITES: Appendix I (prohibits international trade).
    • Wildlife Protection Act, 1972: Schedule I (highest protection in India).
  • Conservation Initiatives:
    • Operation Olivia: An annual mission by the Indian Coast Guard to protect these turtles from illegal fishing trawlers during their nesting season.
    • Tagging: Metal tagging by the Zoological Survey of India (ZSI) helps track their migratory routes and lifespan.