Koh Ma in Ang Thong Marine Park features a shelving coral reef that transitions from shallow depths to black and soft corals. Divers and snorkellers can explore this site at depths ranging from 5 to 25 metres, with an average of 12 metres. The reef supports a variety of marine life, including wrasses, groupers, Copperband Butterflyfish, Golden Butterflyfish, Blacktip Grouper, and Blue-barred Parrotfish. Less frequently, visitors may encounter Blue Ringed Angelfish, Harlequin Sweetlips, Pink Skunk Anemonefish, Longfin Bannerfish, Magnificent Giant Anemone, Rock Cod, Eightband Butterflyfish, and Porcupinefish. The site is suitable for beginners, offering mild currents and visibility between 10 and 25 metres. Entry is possible by both boat and shore.

Haad Salad is a shore-access reef dive located in Ang Thong Marine Park. The site features depths ranging from 8 to 14 metres, with an average depth of 10 metres, making it suitable for beginner divers. Conditions include mild currents and visibility that varies between 3 and 15 metres. Divers should exercise caution during shore entry due to the presence of rocks and sharp coral in the shallows. Sea urchins are present on the reef, so avoid touching the surface or kneeling. Night diving is available at this site, offering a different perspective on the reef environment. Local dive shops provide equipment and guidance for those planning a visit.

Fish & Ships is a wreck dive located 2000 metres offshore in Ang Thong Marine Park. The vessel rests at depths between 18 and 35 metres, with an average depth of 25 metres. This site is strictly for advanced divers due to the overhead environment, moderate currents, and variable visibility ranging from 2 to 10 metres. Divers must manage risks including entanglement and low light conditions. Access is by boat only. The structure requires careful navigation and buoyancy control. Divers should carry primary and backup torches for interior sections. Plan dives to avoid penetration beyond training limits and monitor current strength, which can be significant.

Haad Yao is a reef site located in Ang Thong Marine Park, Thailand, suitable for both beginners and snorkellers. The site features depths between 5 and 14 metres, with an average of 7 metres. Visibility ranges from 5 to 30 metres. Divers can access the site by boat or from the shore. Hazards include sea urchins on the seabed and sharp coral edges; visitors should shuffle their feet during entry and exit. Species recorded around this area include wrasses, butterflyfish, groupers, and anemonefish. Onshore facilities include parking, toilets, showers, and equipment rental. Night diving is permitted at this location.

Construction Artificial Reef in Ang Thong Marine Park is a structured site composed of construction materials. It is suitable for beginner divers, with depths ranging from 8 to 18 metres and an average depth of 13 metres. The site features mild currents and visibility between 5 and 25 metres. Divers should be aware of sharp edges on the structure and potential entanglement hazards. Boat access is required, and the use of a surface marker buoy is recommended due to boat traffic. Species recorded around this area include wrasses, butterflyfish, groupers, and anemonefish. Water temperatures remain warm throughout the year, typically between 28 and 31 degrees Celsius.

The Dive Inn in Ang Thong Marine Park offers a combination of reef and pinnacle topography. Accessible only by boat, the site features depths ranging from 5 to 30 metres, with an average of 15 metres suitable for beginner divers. Visibility varies between 5 and 25 metres, and water temperatures remain warm between 28 and 31C. Divers should be aware of moderate currents, which can run strong near the pinnacle. Guided tours are recommended to navigate these conditions effectively. Night diving is available at this location. Species recorded around this area include wrasses, groupers, rock cod, and various butterflyfish species.

Khom Beach in Ang Thong Marine Park offers a straightforward shore dive suitable for beginners. The site features a reef composed of hard and soft corals at depths ranging from 2 to 11 metres, with an average of 6 metres. Divers experience mild currents and visibility between 3 and 10 metres. Due to the presence of sharp coral and rocks, care is required during entry and exit. Titan triggerfish may be encountered and can be territorial, so maintain a respectful distance. Species recorded around this area include various butterflyfish, wrasses, groupers, and anemonefish. A cafe is available on-site for post-dive refreshments.

Kong Yai is a reef and pinnacle site located within Ang Thong Marine Park. Accessible only by boat from Koh Samui, the site features depths ranging from 10 to 20 metres, with an average of 14 metres. Conditions are generally manageable with mild currents, though currents can strengthen unexpectedly around the pinnacle. Visibility typically ranges between 5 and 10 metres. Due to the variable visibility, divers should remain close to their guide and use the reef structure as a reference point. The site is suitable for beginners and supports night diving. Species recorded around this area include wrasses, groupers, butterflyfish, and various reef-associated fish and invertebrates.