Shark Island – Koh Rong & Koh Rong Samloem Dive Site
Site Overview
Shark Island is a rocky islet with whitetip reef sharks at 12 to 25 metres with coral bommies, dramatic underwater rock formations, and reliable shark encounters in clear offshore water dive site in the Koh Rong & Koh Rong Samloem region of Cambodia, situated among the diverse reef systems and island formations that make this Southeast Asian nation one of the Gulf of Thailand's most emerging diving destinations. The site features depths from 12 to 25 meters with an average depth of 18 meters, offering an extraordinary underwater experience showcasing the remarkable combination of fringing reefs, offshore islands, and historical wrecks that Cambodia's waters are celebrated for among adventurous divers seeking less-crowded tropical diving. Renowned for its encounters with Whitetip Reef Shark, Soft Coral, Gorgonian Sea Fan and other remarkable marine species, Shark Island attracts divers seeking thrilling underwater adventures in one of Southeast Asia's most distinctive and developing diving destinations. The Cambodian coast creates a fascinating underwater landscape of fringing reefs, rocky islands, artificial reef structures, and natural coral communities that provide habitat for diverse marine life in the warm waters of the Gulf of Thailand. The unique geography of Cambodia's coastline with its chain of offshore islands creates varied habitats supporting abundant marine life including tropical reef fish, sharks, rays, and pelagic visitors found in few other destinations. Visibility typically ranges between 5 and 30 metres depending on site location and season with the outer island sites offering the clearest water. Water temperatures range from 26 to 31 degrees Celsius year-round making a 3mm shorty standard equipment. Shark Island consistently ranks among the top dive sites in the Koh Rong & Koh Rong Samloem region, drawing dedicated divers who seek exceptional reef diving experiences combining rich marine biodiversity with the excitement of exploring Cambodia's developing underwater frontier.
Dive Briefing
"A typical dive at Shark Island begins with entry from the dive boat, descending to the main formation at approximately 18 meters while orienting yourself and equalizing before exploring the remarkable Cambodian underwater landscape. Once established on the main formation, divers should swim along the reef structure or wreck exploring diverse habitats, moving between coral encrustations, swim-through sections, and sandy areas while maintaining excellent buoyancy control to protect the marine life colonising the structure below. The most productive depth zone is between 8 and 20 meters where the highest concentration of reef fish species and photographic opportunities are abundant. Navigate along the reef or wreck edge watching for pelagic species in the surrounding water, and check the overhangs, crevices, and ledges where moray eels, groupers, and larger reef fish shelter from the current. Cambodia's reef and wreck environments require careful awareness of marine life hazards and potential entanglement when exploring interior sections. Monitor depth and NDL particularly near 25 meters on the deeper sites, and always maintain a conservative approach to dive planning given the distance to the nearest hyperbaric facilities. Scan the surrounding water for approaching pelagic species including eagle rays and barracuda that patrol the reef edges. Conclude the dive with a slow ascent and a generous safety stop at 5 meters, deploying your DSMB before surfacing and signaling the dive boat for pickup."
Signature Marine Life
Whitetip Reef Shark
Triaenodon obesus
Best: November, December, January
Soft Coral
Dendronephthya sp.
Best: November, December, January
Gorgonian Sea Fan
Muricella sp.
Best: November, December, January
Batfish
Platax orbicularis
Best: November, December, January
Bannerfish
Heniochus sp.
Best: November, December, January
Jack
Caranx melampygus
Best: November, December, January
Barracuda
Sphyraena barracuda
Best: November, December, January
Anthias
Pseudanthias sp.
Best: November, December, January
Safety & Hazards
- Variable visibility from 5 to 20 metres near the coast due to sediment runoff requiring careful buoyancy and buddy awareness
- Marine life hazards including lionfish, stonefish, and fire coral requiring careful hand placement on reefs and wrecks
- Boat traffic in Sihanoukville harbour and coastal shipping channels requiring DSMB deployment and surface awareness
- Moderate currents at some offshore sites requiring drift diving awareness and DSMB deployment
- Hot tropical climate requiring hydration management and sun protection between dives
Traveler Notes
Who is this for?
Shark Island is best suited for Advanced Open Water certified divers with experience in stronger currents and deeper environments. The site rewards experienced divers with dramatic deep reef walls, complex structures, and encounters with large pelagic species including schooling barracuda, eagle rays, and giant groupers in one of the Gulf of Thailand's most compelling reef diving environments. Experienced divers will appreciate the accessible wall sections and pinnacle formations that showcase decades of coral growth and structural features. Given the distance to the nearest hyperbaric chamber, thorough equipment checks, conservative dive planning with extended safety stops, and comprehensive travel insurance with medical evacuation coverage are essential prerequisites for diving at this advanced Cambodian site.
Quick Stats
Dive Logistics
- Scuba Nation Koh Rong
- The Dive Shop Koh Rong
- Reef Diving Cambodia
Photography Info
Best for: wide_angle, sharks, reef
Nearby Stay
Song Saa Private Island
Koh Rong • 10km away
The One Resort
Koh Rong Samloem • 5km away