Dive-site story
Within Mu Ko Chumphon National Park, Koh Ngam Noi rises as a limestone islet framed by submerged boulder formations and sheer drop-offs. Sea anemone carpets cover the rock faces, sheltering dense colonies of anemonefish. Lower diver traffic compared to outer Gulf islands keeps the black coral bushes, gorgonian fans, and barrel sponges intact. Fusiliers and jacks patrol the exposed corners where currents sweep past the reef.
Dense sea anemone carpets covering limestone boulders
Chevron and yellowtail barracuda schools in open water
Occasional whale shark sightings along the Chumphon archipelago
Swim-throughs and crevices between fallen limestone slabs
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
Settled conditions and clear water prevail across spring and summer before the northeast monsoon begins in late autumn.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Saddleback AnemonefishAmphiprion polymnus | Common | ||||||||||||
| Yellowtail BarracudaSphyraena flavicauda | Common | ||||||||||||
| Bigeye TrevallyCaranx sexfasciatus | Common | ||||||||||||
| Whale SharkRhincodon typus | Seasonal | ||||||||||||
| Honeycomb GrouperEpinephelus merra | Common |
Marine forecast
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