Habili Ali

A habili is a reef that never quite grew to the surface, and Habili Ali is the St John's group's strongest expression of the form: a sheer-sided tower standing in open water, its top a few meters down, its base out of sight. With no lagoon or plateau to shelter in, everything happens on the walls and in the current - giant gorgonians on the deeper faces, black coral thickets, grey reef sharks riding the up-current side, and schooling barracuda coiling off the corners. Hammerheads and silvertips pass through in the cooler months, and bumphead parrotfish graze the crest in dawn light. It is a compact, intense dive that punishes sloppy buoyancy and rewards divers who can hold position, look out, and wait.

その瞬間のために: Giant gorgonians and black coral; sharks on the up-current face; a pure pinnacle profile with no easy exit.

地形: A submerged tower rising from deep water to within meters of the surface, walled on all sides

エントリー: An exposed St John's pinnacle that never reaches the surface; entries are negative drops onto the up-current face.

危険生物・リスク: Strong current with nowhere to hide; blue-water ascents; depth creep on featureless walls.

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）。