The island is made up of limestone that forms cliffs on each side, and is covered with forests and plants. Nobody lives on Koh Bon because it has no proper access and no beach. Families of birds of prey have made their nests there, and it is quite common to see 3 or 4 of them flying together above the island!
Isolated in the middle of the Andaman Sea, Koh Bon is very exposed to the elements, offering only very little shelter in the case of bad weather.
There are 3 diving sites at Koh Bon, all of them on the East side of the island.
The EAST END of Koh Bon
The two main sites are located by the East Peak of the island that also shelters the only protective bay for the mooring of the boats.
– The South of the end: this dive starts off easily easy in the pretty bay, the depth of whichvaries between 8 and 12 metres and allows easy exploration of the seabed. The bay offers great natural diversity with fields of hard coral, a nice wave-cut platform, table coral, and some important formations covered with Tridacna clams and is surrounded by thousands of alevins.
If you head for the peak, you can see an impressive rock wall descending up to 35 metres. Covered with multicolour soft corals, this wall is fascinating because of its size and its length. You can find many little rifts packed with prawns – especially the famous Mantis shrimps, red lionfish, nudibranchs and many more. The wall then slowly gets thinner towards the tip of the peak only to then melt into the bottom in the shape of a wide stairway,that goes down up to 40 metres.
– The north of the Peak offers a gently sloping reef with many hard corals that allow the observation of couples of octopuses during courtship or families of scorpionidae and their unsettling mimicry.
Minimum/maximum depth: 3 to 40 metres.
Current: moderate to strong.
Visibility: usually good until 30 metres.
Level: beginners to experienced divers depending on the area.
The PINNACLE of Koh Bon
The pinnacle of Koh Bon is located 800 metres away from the North-East peak of the island. Invisible from the surface, the tip of the rock is 18 metres below the surface and goes down to a depth of 45 metres.
This is a small site, concentrated on what could be described as a sort of immerged mountain, totally covered with soft yellow coral and sea fans. You can frequently meet with leopard sharks, eagle rays and big Jenkins’ whiprays.
Often exposed to strong currents because of its unprotected location, only experienced divers can access it. If you follow a rhythm of slow and steady fin striking, you can reach the reef and the East peak from the pinnacle. This will take you a good ten minutes.
Minimum/maximum depth: 18 to 45 metres.
Current: moderate to strong.
Visibility: generally up to 20 metres.
Level: advanced only.
Such pretty MANTA RAYS
It’s that time of the year again!
From January, the migration of manta rays passes through our beautiful Similan and Surin parks, offering to our queens of the sea a great and pleasant cleaning station around Koh Bon! They come here to get their gills and mouths cleaned, among others.
The cleaning consists of generally deparasitising them and removing any fragments and/or healing their injuries.
Of course, because we love these animals, we want to be able to enjoy their presence more and more, year after year… This is why, if you cross paths with one of these marvellous creatures, we invite you to respect the following rules:
– Never chase them: they will always swim faster than you! Scared, they will go to another site and it might take hours and even days before they reappear…
– Never touch them: just like the whale sharks and other marine animals, their skin is covered with protective mucus that protects them against aggressors. If you touch them, no matter where you brush them, you remove this protective film and their skin is then exposed to all sorts of bacteria and germs. Infections can then develop and get worse quickly, and seriously endanger the health of the animal.
Manta rays, just like whale sharks, are very curious animals who sometimes try to get in touch with the divers. It can be quite common to find yourself only a few centimetres away from a manta ray who wants to establish eye contact with you.
Unfortunately, too many divers still get tempted by this closeness that allows them to touch the animal by just reaching out, but they ignore the consequences of doing so..
Thank you for helping us with the prevention and education of ignorant divers: DO NOT TOUCH MANTA RAYS AND SHARKS, as well as any other marine animal. This is for their own sake, thank you!
Desire to dive ?
Come and join Globe-Divers for 2 beautiful dives at Koh Bon starting from 5100 baths (moreless 115€).
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