Dive-site story
Koh Sii is a limestone islet located among the Ao Nang local islands off Krabi. Underwater, the steep karst walls plunge into a seabed dotted with massive boulders, forming narrow swim-throughs and sheltered overhangs. Large sea fans and patches of soft coral cling to the rock faces, while sandy gullies between the formations host benthic critters.
Limestone swim-throughs and boulder crevices to explore
Sheltered overhangs hosting resting nocturnal marine life
Dense clusters of anemones covering the upper rock surfaces
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 to the Krabi coastline.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brownbanded bamboo sharkChiloscyllium punctatum | Common | ||||||||||||
| Yellowtail barracudaSphyraena flavicauda | Common | ||||||||||||
| Broadclub cuttlefishSepia latimanus | Common | ||||||||||||
| Tigertail seahorseHippocampus comes | Rare | ||||||||||||
| Clark's anemonefishAmphiprion clarkii | Common |
Marine forecast
