Located just between Mu Koh Similan National Park and Mu Koh Surin National Park, Bon is a small island that features underwater sharp rock walls. Technically it is part of the Similan Islands National Park – but it is geologically separate.
The Wall on the inside of Koh Bon Bon is covered with soft corals that are shorter in size but more colorful than normal, which is their uniqueness at this site. Great place for seeing small critters.
Turn around and look into the deep and look for Manta Rays and Whale Sharks. They can Occasionally be found here at around 25 to 30 meters deep.
Always choose a dive center that has staff speaking your language, have insurance and are certified.