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Mini-canyon shape and wider reef-fish mix.
Dive Spot Guide•
Secret Reef
Secret Reef: Koh Chang coral garden canyon
Plan a short Koh Chang boat dive to a shallow coral garden with a sandy bottom, training-friendly depth, and easy reef scanning on calm days.
About Secret Reef
Secret Reef is a shallow coral garden and mini-canyon near Koh Chang's Hin Raab area. The site slopes gently into sand with enough reef structure for relaxed exploration, training dives, and slow photography. It is an easy boat dive with colorful reef life and a profile that stays friendly for newer divers on calm days.
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Research Estimate At Secret Reef
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 15m
AccessSimple entry
CoralHealthy coral
Aquatic LifeGreat variety
FacilitiesGood facilities
Crowd / PopularityFew visitors
CurrentLight current
Where Is Secret Reef?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Secret Reef Planning Details
Depth range, seasonality, and planning context.
Reported Depth
5m - 15m
Depth Note
Shallow plateau around 5 to 6 meters, with a sandy bottom near 12 to 15 meters.
Best Season
November to April
Typical Conditions
A shallow coral garden with a sandy bottom and short canyon sections. Best on calm days when visibility is decent and the reef can be explored slowly.
Safety & Access At Secret Reef
Hazards, restrictions, and access requirements.
Key Hazards
Low visibilitySharp coral
Safety Notes
Keep buoyancy tight over coral and stay aware of the reef edges in the mini-canyon section. The site is beginner-friendly, but the coral still deserves careful trim.
Access Restrictions
Treat it as a boat dive and plan around park fees, boat schedules, and sea state.
Legal Notes
Secret Reef sits in Mu Ko Chang National Park waters, so park rules and any entrance fee may apply.
Local Intel For Secret Reef
Community notes to help plan your visit.
Scuba Diving
A shallow pinnacle dive to around 15 m, described as suitable for beginners.
Freediving
Experienced freedivers may enjoy the shallow top on calm days, but the site is set up primarily for scuba and relaxed reef dives.
Snorkeling
Surface viewing can be worthwhile on calm days, but Secret Reef is mainly a scuba-first dive rather than a snorkel-first stop.
Wildlife at Secret Reef
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Secret Reef
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Secret Reef
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility15m
Activity
No dive activity logged yet.
