The popular local diving sites around Koh Phangan have an abundance of hard and soft corals. The Dives are relatively shallow with a maximum depth of 24 meters. The visibility ranges from 2m to 20m depending on the season, regardless of this, Mae Haad, Koh Ma, Coral Bay and Koh Kong have very much to offer from nudibranchs to barracuda.
There is a wide variety of reef fish and a heaven for macro photography. Some local diving sites can be dived from the shore as well as from the boat. This dive sites Mae haad and Koh Ma can be dived together as they are in the same bay. Koh Ma has been designated as a national marine reserve because of the abundance of marine life.