On the eastern side of Isl.8, the coral reef starts right off the beach and continues down to about 30 meters.

Beacon Reef is one of the easiest dives at the Similans, and the dive site is often used for check-up dives by liveaboards.

Among the hard corals we often see Octopus, Fire Gobies and hunting Trevallies. On the sandy bottom there are different kinds of Rays. In the shallows we quite often see a turtle or two. At Beacon Reef there is also a wreck. A liveaboard sunk here some yeas ago, and here we often see a big school of Batfish.