Green Rock (North West Corner of Nangyuan Island)
Rating 8 / 10
Journey Time 25 minutes
Max Depth 24 metres
Level of Diver Open Water Upwards
Snorkeling Not Great
Description: Single large rock pinnacle rising to within a few feet of the surface. Many scattered rocks and boulders at it's base creating a fantastic maze of caves and swim throughs.
Marine Life Highlights: Green Rock is the tiggerfish ghetto of Koh Tao - you can observe both Titan and Yellow Margin Triggerfish in their nests around the pinnacle.
If lucky you can sea banded sea snakes and hawskbill turtles around Green Rock.
Corals: Mixed hard corals such as lobe and brain corals grow over the rocks. Deeper down there are masses of mushroom corals, plus even deeper soft white corals.