Christmas Point

Off island 9 at the archipelago's northern end, Christmas Point arranges its granite into ridge lines and a run of archways that divers thread with the current at their backs. Big gorgonians and bushy black coral decorate the deeper passages, ribbon eels flag from the sand between boulders, and Napoleon wrasse make stately rounds while jacks harry the fusilier schools above. Leopard (zebra) sharks once lazed on these sand flats routinely; sightings are scarcer now, an honest barometer of regional pressure, though the odd individual still appears. It is the north's classic final-morning dive before boats turn for Koh Bon.

您此行的高光时刻: Archway sequences, ribbon eels and Napoleon wrasse, northern-Similan granite at its prettiest

地形地貌: Granite boulder ridges with archways, sea fans, and sand channels

危险因素: Current through the arches and depth on the outer boulders.

保育: Standard park protections; the sand-resting sharks that remain deserve wide, calm berths.

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）。