Koh Tachai

To the north of the Similans and Koh Bon, and south of Richelieu Rock, and still considered part of the Similan Islands National Marine Park, lies Koh Tachai. Offering reefs, plateaus and pinnacles, this remote island is thriving with a variety of marine life for which has earned its reputation as one of Thailand’s finest diving locations.

Koh Tachai Plateau

Situated approximately 1kilometer south-east of Koh Tachai lies the renowned Koh Tachai Plateau. Known for its abundance and marine life and sometimes ripping current, an advanced level of diving is required for this exciting dive site.

Koh Tachai Plateau Information

 Access to dive site:  By liveaboard
 Diver level:  Advanced
 Currents:  Moderate to strong
 Depth:  16 – 40m

Situated approximately 1kilometer south-east of Koh Tachai lies the renowned Koh Tachai Plateau. Known for its abundance and marine life and sometimes ripping current, an advanced level of diving is required for this exciting dive site.

Comprising a hard coral plateau with vast granite boulders, the reef begins at 16m where a mooring line is attached, and reaches a sandy bottom at 40m. With cracks and canyons, and huge beds of hard coral there is everything here from nudibranchs and sea fans through to manta rays and whale sharks - at the right time of year (January – May for mantas; April/May for whale sharks).

Spiny lobster and moray eels can be found in the cracks, the site is scattered with elegant soft corals and sea fans, and dense schools of reef fish dance around the site making it a hub of activity. Trevally and great barracuda circle this spot, and there is always the chance of spotting something larger in the blue.

Koh Tachai Reef (South East)

Several stretches of reef can be found around the perimeter of Koh Tachai. One section runs eastwards from the northern tip of the island but, is more exposed in high winds. The dive site described here is located n the south-eastern coast of Koh Tachai, and runs parallel to a beautiful and unspoilt beach.

Koh Tachai Reef Information

Access to dive site:  By liveaboard
 Diver level:  Beginner to Advanced
 Currents:  Mild, occasionally strong
 Depth:  8 – 25m

Several stretches of reef can be found around the perimeter of Koh Tachai. One section runs eastwards from the northern tip of the island but, is more exposed in high winds. The dive site described here is located n the south-eastern coast of Koh Tachai, and runs parallel to a beautiful and unspoilt beach.

Mainly comprised of hard coral patches and bommies, the reef begins at 8 – 10m, and gently extends down to a maximum of 25m. With generally mild conditions and plentiful macro life, this is a good spot for all levels of diver, and is often used by liveaboards for night diving.

A multitude of reef life can be seen here - damsel fish, butterfly fish, parrot fish, lionfish and many types of wrasse, as well as moray eels and an assortment of crustaceans. Check the sandy patches for blue-spotted stingrays, and if you may be fortunate enough to see black- or white-tip reef sharks, or a leopard shark resting on the bottom.

Koh Tachai Pinnacle

Koh Tachai Pinnacle, otherwise known as Twin Peaks since it is in fact two pinnacles, is found around half a kilometre south of the island. Known for its sometimes ripping currents, especially around the time of full and new moons, this site requires extra diligence and is suitable for only experienced divers.

Koh Tachai Pinnacle Information

 Access to dive site:  By liveaboard
 Diver level:  Advanced
 Currents:  Strong
 Depth:  12 – 40m

Koh Tachai Pinnacle, otherwise known as Twin Peaks since it is in fact two pinnacles, is found around half a kilometre south of the island. Known for its sometimes ripping currents, especially around the time of full and new moons, this site requires extra diligence and is suitable for only experienced divers.

Starting at 12m and reaching down to 20m, the first pinnacle is a dome shape, has a buoy line which is recommended for use for descents and ascents. The giant granite boulders and rocks which surround this main pinnacle tumble down to nearly 30m, and along the western side, there are canyons and swim-throughs to explore amongst the rocks.

The second pinnacle lies approx. 50 metres to the north, with its shallowest point at 18m, and descends to around 24m. The sandy bottom encircling the site continues to slope away to more than 40m.
Despite its currents, this site is a favourite since its outlying location means it does not get so many visitors, and more importantly, the marine life here is amazing.

Coral outcrops are found all over the rocks, and the northern part of the main pinnacle is particularly rich in multi-coloured soft corals. Macro life is both varied and plentiful, with coral crabs, porcelain crabs, shrimps and lobster, as well as ghost pipefish and nudibranchs.

The sea fans here are huge, and in the deeper areas of the site, you can find octopus hiding in the cracks, and maybe even hawksbill turtles and leopard sharks. Manta rays and whale sharks have been known to visit these pinnacles at certain times of year (January – May for mantas; April/May for whale sharks), and huge schools of big-eye trevally, chevron barracuda and giant barracuda are more common sightings.


LOCATION IN PHUKET

Ocean Geo Diving & Tours

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Tambon Rawai,
Amphoe Muang
Phuket, 83130
Thailand

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