Thomas Reef

Smallest of the four Tiran reefs and, for many guides, the prettiest, Thomas concentrates its color into a tight lap: soft-coral terraces, fields of fire coral, and gorgonians leaning into the flow. Below 35 meters a canyon slices along the eastern side, spanned by natural arches and reserved in practice for technical divers - the recreational drift stays higher, riding the walls among snapper, fusiliers, and patrolling whitetips. Because the reef is short, current dictates everything; on a strong exchange the site becomes a fast scenic transit, on slack it rewards slow inspection of the overhangs. Turtles and eagle rays cross the deep edge, and the top reef glows in afternoon light.

その瞬間のために: Soft-coral terraces at their densest; the deep canyon and arches for qualified teams; fast, exhilarating drifts.

地形: Steep walls, soft-coral terraces, and a deep canyon crossed by rock arches

流れ（カレント）: Current wraps both ends of the small reef and can turn washing-machine quick; listen to the briefing.

エントリー: No moorings on the exposed faces - dives run as drifts timed to the tide.

危険生物・リスク: Strong current and eddies; the canyon lies beyond recreational limits; separation risk on busy days.

許可証＆ルール: Tiran marine-park fee applies.

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）。