Leopard Sharks are sometimes seen. The uninhabited island of Koh Racha Noi is 33km due south of Phuket. The outermost island of the Racha group. The dive follows around the northern tip of the island. There is no mooring buoy.
Currents can be incredibly strong, both horizontally and, even more dangerously, downwards.
These conditions limit the site to experienced divers. This is a good multi-level dive site, going around pinnacles and large rocks. There is a fair display of hard and soft corals, and the usual reef-fish are present in reasonable quantities. If you are lucky you should be able to sight reef sharks, but the main attraction is probably the presence of large Bullethead Parrotfish. The dive follows around the island's southern tip.