Southwest Pinnacle

Southwest is a drowned mountain range in miniature, a cluster of granite spires whose main summit reaches to about 6 m, all of it dressed in the same magnificent-anemone carpet that makes Koh Tao's deep pinnacles glow. It fishes like a smaller, calmer Chumphon: grouper of genuinely surprising size holding in the gullies between spires, schools of snapper and fusiliers turning the towers into silhouettes, barracuda strung across the current line. Longfin batfish drift up to inspect masks. On quiet mornings it may be the most relaxing of the island's big three, and whale sharks include it on their rounds.

您此行的高光时刻: Spire-and-gully topography, outsized groupers, anemone glow with fewer boats

地形地貌: Cluster of granite spires rising from about 30 m

危险因素: Mid-gulf position brings current and chop; watch depth in the gullies.

保育: Fishing lines snag the deeper spires; crews remove what they can, divers report the rest.

高氧（Nitrox）: 在此值得使用——各潜点深度落在富氧空气（nitrox）能有效延长免减压时间的区间（前提是持有相应认证）。