Dive-site story
Koh Ngam Yai is a rugged limestone island situated within the Mu Ko Chumphon National Park. Its underwater topography features sheer karst walls, crevices, and submerged boulders carpeted in sea anemones and branching yellow whip corals. Schools of pelagics circle the outer drop-offs, while macro critters shelter in rock fissures along the shallower flats.
Extensive walls covered in dense yellow whip coral forests
Frequent visits from cruising whale sharks during peak dry season
Vast expanses of sea anemones teeming with saddleback and false clown anemonefish
Swim-throughs and jagged limestone crevices to explore
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
Spring and summer provide the calmest sea conditions and optimal visibility, coinciding with frequent whale shark encounters.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Whale SharkRhincodon typus | Seasonal | ||||||||||||
| Yellowtail BarracudaSphyraena flavicauda | Common | ||||||||||||
| False ClownfishAmphiprion ocellaris | Common | ||||||||||||
| TrevallyCaranx melampygus | Common |
Marine forecast
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