Tuna Wreck is an artificial reef located off Koh Bon, Thailand, resting at depths between 28 and 40 metres. This advanced dive site features a structure colonised by soft corals and gorgonians, attracting diverse marine life including wrasses, groupers, and triggerfish. Divers may also encounter ornate ghostpipefish, ocellaris anemonefish, and bluefin trevally. The site is subject to moderate currents and visibility ranging from 10 to 25 metres. Due to the depth and potential for sudden thermoclines, which can drop water temperatures by 5 to 7 degrees Celsius, divers must maintain strict buoyancy control and monitor gas consumption closely. Boat access is required for this site.

Princess Bay is a reef site located 1000 metres off Koh Bon in the Andaman North region of Thailand. Accessible only by boat, the site features depths ranging from 5 to 19 metres with an average of 15 metres. Divers encounter mild currents and visibility between 20 and 40 metres. The reef structure supports various marine life, including wrasses, Moorish idols, Ocellaris anemonefish, Orangestripe triggerfish, Striped surgeonfish, Redlip parrotfish, Bluestreak cleaner wrasse, Brown butterflyfish, Blue dragon, Powder-blue surgeonfish, coral grouper, giant moray, and other groupers. This site is suitable for beginners and supports night diving, which offers a distinct perspective on the reef environment.

Hideaway Bay at Koh Bon offers a diverse underwater environment featuring a gently sloping reef and the Tuna Wreck. The site ranges from 5 to 40 metres in depth, with an average of 20 metres. Divers can explore the reef or visit the Tuna Wreck, which is suited for advanced divers. Underwater, there are Tsunami memorials located at depths of 12 to 15 metres. Marine life includes common sightings of triggerfish and wrasses, alongside less frequent encounters with ornate ghostpipefish, giant moray, and various groupers. Access is by boat only, with mild currents and visibility typically between 15 and 30 metres. Hazards include sharks and stonefish.

Anita’s Reef is a rolling reef slope located on the east side of islands 5 and 6 in the Similan Islands. The site features a mix of reef, wall, and wreck topography, extending from a shallow depth of 5 metres down to 30 metres, with an average depth of 20 metres. Divers and snorkellers can expect mild currents and visibility ranging from 5 to 40 metres. Access is strictly by boat. The site is suitable for beginners and supports night diving. Hazards include boat traffic, deep sections, potential entanglement, sharp coral, and strong currents.

Stonehenge is a deep, advanced drift dive located off Koh Bon in the Andaman North region. The site features a reef environment with depths ranging from 24 to 40 metres, averaging 30 metres. Access is strictly by boat due to its distance from shore. Divers should be prepared for strong currents and variable visibility between 10 and 30 metres. Water temperatures typically range from 27 to 30C, though thermoclines and the Green Monster phenomenon can cause temperatures to drop significantly, sometimes reaching 21C. Hazards include strong currents, lionfish, sea urchins, sharks, and stonefish. Night diving is permitted at this location.

East of Eden is a reef site located at Koh Bon, Thailand, accessible only by boat. The site features depths ranging from 5 to 35 metres, with an average depth of 16 metres. Visibility typically spans 20 to 30 metres, providing clear views of the reef structure. Conditions include moderate currents, making it suitable for beginners, though divers should remain cautious of sharp coral and rocks that can cause cuts. The site is subject to boat traffic, necessitating the use of a surface marker buoy during ascents. Water temperatures remain consistent between 27 and 30C throughout the year. Night diving is available at this location.

Koh Tachai Pinnacle is an offshore reef dive located in the Andaman North region of Thailand. This site features a reef structure composed of hard corals, soft corals, and gorgonian sea fans. Divers typically experience depths between 8 and 22 metres, with visibility ranging from 15 to 30 metres. The site is suited for intermediate divers due to moderate currents that can strengthen with little warning. Boat access is required for this location, which sits 65 kilometres from shore. Divers should maintain close proximity to the reef structure for shelter and avoid contact with sharp coral and rocks to prevent injury.

West of Eden is a diverse dive site located at Koh Bon, Thailand, characterised by a combination of reef, wall, and canyon topography. Suitable for intermediate divers, the site ranges from 3 to 40 metres in depth, with an average depth of 15 metres. Access is by boat only. Divers should be prepared for moderate currents and variable visibility between 10 and 40 metres. Water temperatures typically range from 27 to 30°C, though significant thermoclines can cause temperatures to drop to 23 to 24°C. Hazards include strong currents, surge, and the potential for cold water, requiring careful attention to depth and decompression limits.