Dive-site story
Set within the Mu Ko Chang National Park archipelago, Koh Thian features shallow sloping reefs that flank the rocky islet. Large Porites coral heads and dense patches of staghorn coral cover the seabed, transitioning into sand flats dotted with sea anemones. Calm surface conditions and gentle gradients make it a staple for day boats departing from Koh Chang and Koh Kood.
Extensive hard coral gardens featuring staghorn, brain, and table formations
Sheltered reef slopes ideal for macro photography and relaxed navigation
Frequent encounters with stingrays resting along the sandy edges
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
The dry northeast monsoon brings the calmest seas and best underwater visibility, while southwest monsoon rains often reduce boat operations from June to September.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bluespotted ribbontail rayTaeniura lymma | Common | ||||||||||||
| Clark's anemonefishAmphiprion clarkii | Common | ||||||||||||
| Honeycomb grouperEpinephelus merra | Common | ||||||||||||
| Yellowtail barracudaSphyraena flavicauda | Common | ||||||||||||
| Hawksbill sea turtleEretmochelys imbricata | Seasonal |
Marine forecast
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