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Scientists found many green sea turtles. They live in the Huangyan Dao lagoon. This place is in the South China Sea. The turtles seem very strong. The group is healthy and safe. This shows the local nature is good.
The water has strong coral reefs. Thick seagrass grows near the bottom. Seagrass is the main food for these turtles. China protected the area well. The plants grew very dense. The turtles have enough to eat. The area supports their full life cycle.
The team used drones to watch them. Drones flew over the water. They recorded rare video of turtles swimming. This method is new and gentle. Old ways often scared the animals. Drones keep a safe distance. The turtles stay calm during the count. This gives accurate data for scientists.