Green Rock is a dive site off the small island of Nang Yuan, Koh Tao. The spot is made up of rock formations and boulders, featuring several thrilling swim-throughs and small caves.
The depth ranges from 5 to 30 meters (15-100 feet), but Green Rock is recommended for experienced divers due to the strong currents. This is also a good place to get your Deep Diver certification.
Hawksbill turtles, green turtles, yellowtail barracudas, banded sea snakes, triggerfish, Durban shrimps, wart slugs, unicornfish, polka dot nudibranchs, and numerous other creatures can be spotted here. Sightings of whale sharks have also been reported in season.
Average visibility at Green Rock, Koh Tao is 10 to 30 meters (33-100 feet).