Visibility 15 - 30 meters. Km north of Koh Phangan, this 15m block emerge from the sea. The less deep part around this rock is covered with anemones and different corals. In the vertical faces, small moray-eels watch the divers. The bunches of black corals are many on this site.
Current can be important.
For experienced divers. Visibility 10 - 30 meters. Km south-west of Koh Nang Yuan, this immerged reef is made of 3 pinnacles. Huge groupers hide under a rock, two leopard sharks have their home there. Big pelagic fishes swim around their rocks.