Green Rock
Green Rock is a cluster of granite boulders off the north-west tip of Koh Nang Yuan, cut by swim-throughs, small caverns and narrow passages from about 6 m down to 28 m. Blue-spotted stingrays rest on the sand patches, moray eels and groupers hide in the cracks and yellowtail barracuda hang above the rocks. It is best known for its titan and yellowmargin triggerfish, which defend nests aggressively in the breeding season. Sea snakes and good nudibranch hunting add to the maze-like dive.
depth: 4–28 m