Manza Dream Hole

Dream Hole is a keyhole through the Manza reef plate: a chimney that swallows divers in single file at five meters and releases them through a window in the wall at around twenty-five. Sweepers pack the shaft in shifting curtains, torch beams strobe across them, and the exit arrives as a rectangle of violent blue that makes every photographer stop mid-column. Outside, the Onna coast wall carries fans and reef traffic back toward the boat. The dive is short, vertical, and theatrical, and it demands the buoyancy to descend a tube full of fish without touching anything.

その瞬間のために: Chimney descent through sweeper curtains, blue exit window, clean Onna coast wall

地形: Vertical shaft through the reef plate exiting onto a coral wall

流れ（カレント）: The hole is sheltered; the wall outside can carry some flow.

エントリー: Boat dive on the Onna coast near Cape Manza; groups drop onto the reef flat and file into the shaft.

危険生物・リスク: Overhead environment in the shaft and queueing divers; commit only with the group briefed order.

ナイトロックス: ここでは効果的です——このエリアのプロファイルは、ナイトロックスが無減圧潜水時間を有意に延ばせる水深帯にあります（適切なトレーニングを受けていることが前提です）。