|Visibility: 5 - 20 meter|
|Depth: 5 - 30 meter|
|Snorkel Condition: good|
Three Islets consists of one small island and two large rocks, all of which rise above the surface. Each could be considered a separate site; there is no way to see them all on a single dive, or even a full day of diving. All three are perfectly suited for multilevel profiles, with thriving marine life from the bottom to the surface.
Underwater, the combination of unusual topography and a tremendous variety of creatures makes this one of the best dive sites in the Mergui Archipelago. Nearly every square meter is riddled with crevices that provide shelter and holdfasts for an enormous volume of fish an invertebrate life.
At the east side you have got the possibility to dive along a wall, which is overgrown with gorgonian. Also a nice site for night diving. At the west side you find a coral reef softly sloping down. Lots of hard- and soft corals. It's a place for under water photographers, who are looking for snakes and the rare frog fish.
Aside from the marine life, another outstanding feature is a large canyon on the north end of the main island where you can encounter semi resident grey reef sharks. Past the canyon on the right you will find an opening to a tunnel that runs completely through the island and exits on the east side at about 15 m. Be sure not to disturb the several huge tawny nurse sharks that sometimes rest within the crevices as you pass through.