Koh Haa offers a diverse underwater landscape featuring a reef, pinnacle, and wall. Depths range from 8 to 40 metres, with an average of 20 metres, making this site suitable for intermediate divers. Access is by boat only, situated 15 kilometres from shore. Visibility varies between 10 and 40 metres, and water temperatures remain between 28 and 31 degrees Celsius. Divers should be prepared for moderate currents that can intensify near the pinnacle and wall. The site supports a variety of reef fish and invertebrates typical of the region. Equipment rental is available for those requiring gear.

Koh Haa offers diverse underwater topography, featuring a combination of reefs, walls, pinnacles, caverns, and wrecks. This site is suitable for intermediate divers, with depths ranging from 5 to 60 metres and an average depth of 20 metres. Visibility varies between 10 and 40 metres, and water temperatures remain consistent between 29 and 31 degrees Celsius. Access is by boat only, located 30 kilometres from shore. Divers should be prepared for moderate currents that can shift quickly. Due to the depth range and potential for strong currents, careful monitoring of air and bottom time is essential. Protective clothing is recommended to mitigate the risk of jellyfish stings.

Ko Ha 1 is a marine dive site located near Koh Bida Nok, Thailand, offering a diverse topography of reefs, caverns, and walls. Divers can explore depths ranging from 5 to 30 metres, with an average depth of 22 metres. Access to the site is by boat, as it is situated 20 kilometres from the shore. Conditions are generally mild, though visibility can fluctuate between 10 and 30 metres. Thermoclines may occur, which can lead to sudden temperature drops and reduced visibility. The site is suitable for beginners and supports night diving, with typical dive durations of 60 minutes. Divers should be aware of the presence of jellyfish.

Hin Bida Reef is a circular reef and pinnacle formation situated between Koh Bida Nok and Koh Maa. This site features depths ranging from 3 to 24 metres, with an average depth of 18 metres. Access is strictly by boat, as the site is located 8 kilometres from shore. Divers and snorkellers may encounter moderate currents and visibility that fluctuates between 5 and 25 metres. Species recorded around this area include wrasses, butterflyfish, moray eels, and various lionfish. Hazards to be aware of include stonefish, lionfish, strong currents, and periods of low visibility. The site is suitable for beginners, with typical dives lasting 50 minutes.

Shark Point is a reef and pinnacle site located near Koh Bida Nok. The site features depths ranging from 5 to 24 metres, with an average depth of 15 metres. Access is strictly by boat, and the site is suitable for intermediate divers due to moderate currents. Visibility typically ranges between 10 and 30 metres. Hazards include boat traffic, sea urchins, and strong currents. Species recorded around this area include zebra sharks, peacock mantis shrimp, ornate ghostpipefish, sea kraits, titan triggerfish, coral grouper, giant moray, Indian lionfish, pharaoh cuttlefish, zebra lionfish, day octopus, wrasses, checkerboard wrasse, and ocellaris anemonefish.

The Chimney at Koh Bida Nok is a diverse dive site featuring a complex topography of reefs, walls, caverns, and a pinnacle. Divers can explore a drop-off that ranges from 5 to 35 metres, with an average depth of 18 metres. The site is accessed by boat and is suited for intermediate divers due to the presence of overhead environments and moderate currents. Hazards include potential entanglement, sharp coral, and strong currents. Typical dives last approximately 50 minutes, with visibility ranging between 15 and 30 metres. Water temperatures remain warm throughout the year, typically between 28 and 31 degrees Celsius.

The Lagoon at Koh Bida Nok features a diverse underwater topography including a reef, wall, and drop-off, complemented by caverns, swim-throughs, and a pinnacle. This site is accessible by boat and is suitable for beginners, with depths ranging from 1 to 35 metres and an average depth of 10 metres. Divers encounter mild currents and visibility that varies between 5 and 40 metres. The site supports night diving and offers a 50-minute typical dive duration. Hazards to note include boat traffic, deep sections, overhead environments, strong currents, and potential encounters with jellyfish, lionfish, stonefish, and sharks, as well as sharp coral.

Koh Haa #3 is a diverse site featuring a reef, wall, and cave system. The reef extends from shallow water to a depth of 30 metres, with an average depth of 15 metres. The site is accessible only by boat and is suited for intermediate divers due to the overhead environment within the cave. Visibility ranges from 5 to 30 metres, and mild currents are typical. Water temperatures generally remain between 28 and 31C, though thermoclines can cause localized drops in temperature and visibility. Divers should maintain careful buoyancy control to avoid contact with sharp coral and cave walls.