Koh Ha is a diverse marine site near Phi Phi Leh, Thailand, featuring a complex topography of reefs, walls, pinnacles, and drop-offs. The site is notable for its cave and cavern systems, which present an overhead environment requiring appropriate training. Divers can expect depths ranging from 5 to 45 metres, with an average depth of 25 metres. Visibility typically spans 15 to 30 metres, though currents are moderate. Access is exclusively by boat, and the site is suited for intermediate divers. Water temperatures remain warm throughout the year, ranging between 28 and 31 degrees Celsius. Night diving is available at this location.

Koh Kwang at Phi Phi Leh provides a diverse underwater environment featuring a combination of reef, wall, and cave topography. Suitable for beginners, the site ranges from the surface to a maximum depth of 20 metres, with an average depth of 10 metres. Divers and snorkellers access the water directly from the shore. Visibility typically spans 10 to 25 metres, and water temperatures remain warm throughout the year. While the site is accessible, be aware that currents can be moderate and may build quickly. The cave is a defined overhead environment requiring specialist training to enter. On-site facilities include toilets, showers, changing rooms, and a cafe.

Phi Phi Leh Pinnacle is a deep-water reef structure located in the Andaman Sea. The site features a dramatic profile, descending from 15 metres to a maximum depth of 70 metres, with an average depth of 30 metres. Due to the significant depth and potential for moderate to strong currents, this site is suited for intermediate divers with solid buoyancy control. Boat access is required for all dives. Visibility typically ranges between 10 and 30 metres. Divers should plan gas consumption conservatively and monitor their position against the reef, as currents can develop rapidly. Water temperatures generally range from 28 to 31 degrees Celsius, though occasional thermoclines may cause drops of 5 to 7 degrees.

Koh Hong is a reef and wall site located 1000 metres from shore in the Andaman Sea. Suitable for beginners, the site features depths between 5 and 15 metres with an average of 10 metres. Divers experience mild currents and visibility ranging from 5 to 15 metres. The topography includes overhead sections and swim-throughs, requiring caution for those without guide supervision. Access is by boat only, with typical dives lasting 40 minutes. Water temperatures remain warm throughout the year, ranging from 28C to 31C. Divers should remain aware of potential jellyfish presence in the water column during their dive and safety stops.

Koh Daeng, also known as Red Island, is a straightforward reef dive located off Phi Phi Leh. The site features depths ranging from 5 to 14 metres, with an average depth of 10 metres, making it suitable for beginner divers. Access is by boat, and the site is characterised by mild currents and visibility between 5 and 20 metres. Divers should exercise caution regarding hazards including jellyfish, sea urchins, sharp coral, and stonefish. When navigating the reef or sandy patches, maintain awareness of your surroundings to avoid contact with marine life or substrate. Guided tours are recommended to assist with navigation and identifying local features.

Koh Ma Tang Ming is a beginner-friendly reef site located off Phi Phi Leh, Thailand. Accessible only by boat, the site features a reef structure with depths ranging from 5 to 13 metres, averaging 10 metres. Conditions are generally relaxed with mild currents and visibility between 10 and 25 metres. The reef supports a variety of hard and soft corals. Divers and snorkellers can expect to encounter angelfish, butterflyfish, pufferfish, blue spotted stingrays, moray eels, and nudibranchs. Water temperatures remain consistent between 28 and 31 degrees Celsius throughout the year, making it a suitable location for both diving and snorkelling activities.

Koh Bida Nok is a limestone island in the Andaman Sea featuring a diverse underwater landscape of reefs, walls, and caves. Suitable for beginners, the site offers depths ranging from 8 to 30 metres with an average of 15 metres. Access is by boat, and divers typically spend 50 minutes exploring the area. Visibility varies significantly from 5 to 30 metres. While currents are generally mild, they can strengthen without warning, so divers should remain near the wall or reef. Hazards include jellyfish, sea urchins, stonefish, and sharp coral. Wearing a full wetsuit is recommended for protection, and divers should avoid touching the substrate.

Koh Poda is a reef site located off Phi Phi Leh, Thailand, offering a manageable experience for beginners. The reef features hard coral formations, including staghorn and table coral, set at depths between 5 and 12 metres with an average of 8 metres. Divers and snorkellers can expect mild currents and visibility ranging from 10 to 20 metres. Access is strictly by boat, and visitors should exercise caution regarding surf during entry and exit. Once in the water, avoid contact with the reef as submerged rocks and coral edges are sharp. Arriving early in the morning is recommended to avoid the midday crowds and enjoy clearer water conditions.