EcoSea Dive at Koh Tas features a mix of reef and wreck topography suitable for beginners. Divers can explore depths ranging from 5 to 18 metres, with an average depth of 10 metres. Entry is possible from both shore and boat. Visibility is variable, ranging from 5 to 25 metres, and currents can reach moderate levels. The site supports night diving and provides full facilities including equipment rental, air fills, and rinse stations. Divers should exercise caution regarding sharp coral and the presence of lionfish. The water temperature remains warm throughout the year, typically between 28 and 31 degrees Celsius.

East Reef is a shallow coral reef located 100 metres off the coast of Koh Rong Samloem. The site is well-suited for beginners, with depths ranging from 2 to 8 metres and an average depth of 5 metres. Divers typically spend 40 minutes exploring the reef, which experiences mild currents and visibility between 5 and 25 metres. Access to the site is by boat, and divers should remain aware of boat traffic in the area. Water temperatures are consistent, ranging from 29 to 31 degrees Celsius throughout the year. Local facilities include air fills, equipment rental, and guided tours.

Last Chance is a drift dive site located 1000 metres off the southern tip of Koh Rong Samloem. This site features a reef and wreck topography at depths ranging from 8 to 15 metres, with an average depth of 12 metres. Divers should be prepared for moderate currents, which support a variety of marine life. Species recorded around this area include wrasses, nudibranchs, butterflyfish, anemonefish, groupers, and rays. The site is accessible only by boat and is suited for intermediate divers. Visibility varies between 5 and 25 metres. Water temperatures remain warm throughout the year, ranging from 29 to 31 degrees Celsius. Be aware of sharp coral when navigating the reef.

Vietnamese Bay is a reef site located 1000 metres off the coast of Koh Rong Samloem, Cambodia. Accessible only by boat, the site features a reef with depths ranging from 5 to 13 metres, averaging 10 metres. Conditions are generally mild, though visibility fluctuates between 5 and 25 metres. The site is suitable for beginners and supports night diving, with typical dive durations of 50 minutes. Divers should remain aware of boat traffic in the area. The topography includes both reef structures and sandy sections, providing a varied environment for underwater exploration.

Ship Wreck at Koh Rong Samloem is a deliberately sunk vessel serving as an artificial reef. The structure lies at depths between 8 and 18 metres, making it suitable for intermediate divers. Access is by boat only, with typical dives lasting 45 minutes. Visibility is highly variable, ranging from 5 to 25 metres, and water temperatures remain consistent between 29 and 31 degrees Celsius. While currents are generally mild, they can strengthen unpredictably. Divers should be aware of entanglement risks within the wreck's interior and carry a torch to navigate darker sections. Night diving is available at this site.

Secret Reef in the Koh Rong Archipelago is a challenging site requiring an Advanced Open Water certification. The topography consists of a reef structure reaching depths of 28 metres, characterised by sharp coral and rock formations that necessitate precise buoyancy control. Divers must access the site by boat. Conditions are variable, with visibility ranging from 5 to 25 metres and strong currents that fluctuate with tidal movement. Water temperatures remain consistent between 29 and 31 degrees Celsius throughout the year. Due to the presence of sharp coral and strong currents, divers should coordinate closely with their boat crew to assess conditions before entry.

Corral is a shallow site located 200 metres off the shore of Koh Rong Samloem, offering a combination of muck and reef topography. Depths range from 5 to 11 metres, making it suitable for beginner divers. Visibility is typically between 5 and 10 metres, requiring divers to focus on the substrate. Water temperatures remain warm, between 29 and 31 degrees Celsius. Access is by boat only. Divers should be aware of moderate currents and plan their dives accordingly. Hazards include jellyfish, sea urchins, and low visibility. Night diving is permitted at this location, allowing for closer inspection of the bottom environment.

Coral Bay is a reef site located 1500 metres off the coast of Koh Rong Samloem. The reef topography extends from the shallows to a maximum depth of 25 metres, with an average depth of 10 metres. This site is accessible only by boat and features mild currents, making it suitable for beginners. Visibility varies significantly from 5 to 25 metres. Water temperatures remain consistent between 29 and 31 degrees Celsius throughout the year. Divers should be cautious of sharp coral and rocks, as well as boat traffic near the surface. Night diving is available at this location, and dive shop facilities are provided for charter services.