Hin Daeng is arguably one of the best dive sites in the country. A large rocky outcrop forming a series of walls and ledges below the surface that are covered in red soft corals (which derives it the name). Due to the isolation of Hin Daeng and Hin Muang they form the only reef feeding ground for a lot of surrounding ocean and therefore attract the bigger pelagics.
It is one of the very few places you may be lucky enough to spot grey reef sharks or even a whale shark. Mantas often frequent the area so keep a lookout for them. Marine life is generally larger and more colourful here than that closer to the shore with rarer species including clown and redtooth triggers, powder blue surgeonfish and some big morays. There are also patrolling barracuda and a resident school of batfish, this is a great dive site. The spot can get busy with ocean traffic at peak times.