Anita's Reef – Similan Island no. 5. Anita's Reef is on the west coast of this small island, just off Similan Island No.4. The reef is a rather innocuous sandy slope with some spectacular coral bommies and patches, made up of table corals and staghorn corals. On the gentle slopes you can seelionfish and the reclusive and beautiful clown triggerfish and colourful Oriental sweetlips. Anita's Reef has large sandy patches and easy currents, that make it an ideal site for an early check-out dive on a Similan scuba liveaboard cruise. Beacon Reef – Similan Island no. 8 Koh Similan. Beacon Reef features a steep drop-off with a striking diversity of hard corals from 35m almost to the surface. This site has the greatest variety of healthy hard corals in the Similan Islands, exceeding 300 species. There are countless nudibranchs, scorpionfish and devil firefish, one of the most beautiful fish in the sea.

Breakfast Bend – Similan Islands No.9 - Koh Bangru Breakfast Bend derives its name from the beautiful early morning light here, and the coral is still in great shape despite damage to the southern areas of Island 9 due to the Asian tsunami in 2004. There are larger but less frequent corals on the steep reef slope where plate corals dominate. The reef slope drops to 18 metres then steep banks descend further to 34 metres where you can see black-spot garden eels. In the shallows,leopard sharks are seen resting in the sand and often octopus may be found lurking in the vicinity.

East of Eden - Similan Island No.6 - Koh Payu. Located on the southeast coast of the island, this dive site has the most incredible bommie in the Similan Islands. Just to the south of the main reef and from a depth of 21 metres up to 12 metres, the concentration of marine life is unequalled in the Similans. The main body is covered in a breathtaking array of blue and purple soft corals, lobophyton soft corals, and red bulb tentacle anemones hosting skunk anemone fish andwestern clownfish. Small groups of redtail butterflyfish, checkered snapper and yellow boxfish are ever-present.

Koh Bon Island. Koh Bon Island lies an hour or so north of the Similan Islands. It's one of the best places in Thailand to see manta rays, especially from April to May, though the last couple of years have seen Mantas almost year round. There's a 33 metre wall on its south side, facing a small cove, with a stepped ridge pointing west and down to over 40 metres. It is at the edge of this ridge that divers are drawn, as they peer into the blue looking for that first sight of a black and white wing that signals an approaching manta ray. Keep a little distance from the rays and the chances are good that they'll circle and swoop around, feeding on the plankton. If the manta feels threatened by rapid or aggressive movements it will just glide off into the distance and find somewhere else to feed.

Koh Tachai – Koh Tachai Island. Koh Tachai (Tachai Island) lies about halfway between the Surin and Similan Islands and is rated as one of the best sites for Thailand scuba liveaboards as it's normally visited on the way to Richelieu Rock from the Similans. There are several dive sites around the island but the most famous is Koh Tachai Plateau which lies southeast of the island, about 1 kilometre offshore. The plateau is a submerged crowned reef of hard sheet corals, and scattered boulders. These boulders provide great swim-throughs and cut-through opportunities. They also provide refuge for tired scuba divers caught unawares by the sometimes hectic currents!