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Koh Tachai Pinnacle, on a good day, may very well compete with Richelieu Rock for the title of best Thailand dive site. This group of submerged boulders is, on most days, crossed by very particular (often strong) currents that attract an incredible amount of predatory fish in schools. With a bit of luck, especially between January and May, Mantas and Whalesharks can also be encountered here! Koh Tachai Pinnacle is made by a submerged group of gigantic granite boulders that remind of the Similan Islands dive sites. The summit is at around 10 meters of depth and has a mooring line/buoy to assist divers in their descent. There are actually two pinnacles, the main pinnacle in the south is bigger and is the area where most dives at Koh Tachai Pinnacle take place. It is made by a huge dome-shape boulder surrounded by many other smaller ones. The scenery on the pinnacle is very diverse, as the southern side is characterized by large and oddly shaped boulders that create a stunning underwater scenery, while on the north side lays one of the most beautiful and pristine coral gardens in Thailand. This huge pinnacle connects to the smaller second pinnacle to the north through a sand patch at 24 meters, with an approximately 50 meters long swim. The top of the northern pinnacle lies at 18 meters of depth, and comprises a wide range of rock formations and is home to large and beautiful sea fans and soft corals in pristine conditions. But the amazing underwater topography and coral reef pale in comparison to the insane amount of fish and marine life that can be found at Koh Tachai Pinnacle. Large schools of huge Giant Trevally, Bluefin Trevally, Dogtooth Tunas and Rainbow runners are often hunting around the boulders offering a spectacular show for the divers. A massive school of Chevron Barracudas is occasionally found whirlpooling over the pinnacles. Large Marble Groupers literally all over the place,  and schools of curious Batfish often keep us company during the safety stop. And these are just the major highlights, but there is much much more to be spotted here, including occasional passage of Manta Rays and Whalesharks when lucky! One dive is simply not enough to fully enjoy this amazing dive site, and that’s why we include at least 2 dives at Koh Tachai Pinnacle in our MV Giamani cruises. More often than not, the current at Koh Tachai Pinnacle can be very strong and that’s why the dive site is teeming with so much life. This can make it a challenging dive, although it can be easily managed by hiding behind the boulders and swimming close to the bottom.

Other Thailand Dive Sites

• Similan Islands Dive Sites
• Koh Bon & Koh Tachai Dive Sites
• Richelieu Rock
• Koh Haa, Hin Daeng & Hin Muang
• Phi Phi Islands Dive Sites
• Racha Islands Dive Sites
• Shark Point, King Cruiser & Koh Doc Mai
• Khao Lak Wrecks