Monad Shoal

Monad Shoal is the world's most dependable window on the pelagic thresher shark, an animal that otherwise lives beyond diver depth. At dawn, threshers rise onto this drowned island's plateau to visit cleaning stations, and divers kneel behind rope lines in gray-blue early light as sharks with scythe tails carve slow circles meters away, sometimes joined by devil rays or a passing manta. The ritual is regulated: fixed descent lines, no strobes without permits, no crossing the ropes. Between passes the shoal itself is plain, which nobody minds. You are there for one of diving's great appointments, kept more mornings than not.

您此行的高光时刻: Thresher sharks at cleaning stations most dawns, occasional rays, a genuinely unique spectacle

地形地貌: Plateau of rubble and coral heads rimmed by drop-offs

水流: Usually gentle on the plateau; the exposed edges catch more flow.

入水方式: Boats leave Malapascua around 5 a.m. to reach the shoal by first light; descents follow fixed lines to the viewing areas.

危险因素: Repetitive 20 m dawn profiles on consecutive days; monitor no-deco time while watching the blue.

许可证与规定: Per-diver marine protected area fee collected by operators.

保育: A locally protected area funded by diver fees; rope-line and lighting rules exist because the sharks abandon harassed stations.

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）。