Koh Bon Thailand is small island situated north of the Similan Islands, however it is still considered to be part of the Similan National Marine Park. A favourite dive site is the western ridge of the islet, which falls steeply away to the deep. The reef slopes from a depth of 10 metres down to sandy bottom at 25 to 30 metres. The majority of corals here are hard corals including staghorn coral and brain coral that are interspersed with a few big coral heads.
The ridge is covered in tiny yellow soft corals and has an abundance of life due to the usually medium/strong currents but this is what brings in the big fish. This is the number 1 place in Thailand to see Manta Rays, they love to hang out on the ridge with us and get cleaned by the butterflyfish and play with our bubbles; all you do is sit back and enjoy the show.