Koh Bon West Ridge

Koh Bon's western ridge is Thailand's most reliable manta station. The limestone spur steps down from the island to a nose at around 18-25 m where cleaning stations operate, and reef mantas arrive on their own schedule to bank in slow circles overhead, sometimes one, sometimes a squadron that stays the whole dive. Etiquette is drilled: hold the reef side, stay low, let the animals run the geometry. Manta-less days still pay in yellow soft coral on the ridge's north face, octopus in the rubble, and napoleon wrasse cruising the steps. Liveaboards revisit until the mantas oblige.

Le moment pour lequel vous venez: Reef mantas at cleaning stations, a diveable ridge line in all currents, repeat-visit rhythm

Topographie: Limestone ridge stepping down to a deep point

Courant: The ridge nose catches flow from both sides; mantas prefer it that way.

Dangers: Current at the nose and depth creep following mantas off the ridge.

Conservation: Cleaning stations fail when divers crowd them; the low-and-still protocol is enforced by every good crew.

Nitrox: Pertinent ici : les profils se situent dans la plage où le nitrox prolonge significativement le temps sans palier (avec la formation pour l'utiliser).