Manta Point (Lankan Reef)

Lankan Reef's coral blocks work as a drive-through car wash for reef mantas during the southwest monsoon. Divers settle on sand patches a respectful distance back while mantas circle overhead, stalling above the bommies so cleaner wrasse can work their gills and bellies. On busy days several animals queue at once, looping for an hour or more. Out of season it is an ordinary, pleasant slope — the mantas are the show, and they follow the plankton calendar, not the dive schedule.

您此行的高光时刻: Queueing reef mantas at cleaning stations; close, calm passes over divers' bubbles

地形地貌: Sloping outer reef with scattered large coral blocks on sand

水流: Gentle to moderate flow along the outer reef; guides position groups down-current of the cleaning blocks.

危险因素: Boat traffic overhead in season; mild surge on the shallow reef top.

保育: Kneel only on bare sand, stay low, and never swim at or over an approaching manta — blocking the cleaning station ends the encounter for everyone.

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）。