Punta Sur — Devil's Throat

Devil's Throat is Cozumel's rite of passage: a coral tunnel that swallows the group in single file, bends downward through the dark, and spits you out on the open wall around 40 m with blue in every direction. The passage itself is short but committing — no turning a group around mid-tube — and the surrounding Punta Sur reef keeps the drama going with deep cuts, black coral, and the chance of a reef shark cruising the point. Bottom time is brief and the ascent is a long, scenic decompression-style drift up the wall shoulder.

您此行的高光时刻: The tunnel exit at 40 m, cathedral-like passages, black coral, big-animal potential at the point.

地形地貌: Steep coral promontory riddled with tunnels; the Throat is a narrowing passage that exits on the wall face near 40 m.

水流: Current at the island's southern tip can be unpredictable and switch with the tide.

入水方式: Exposed southern site; dived only when conditions allow, with prompt descents onto the reef shoulder.

危险因素: Overhead passage, depth at the exit, short no-deco window, current at the point. Not a dive for the unpracticed.

保育: Marine-park site; guides limit group sizes through the tunnels.

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）。