Sharks
Silvertip Shark
Carcharhinus albimarginatus · Cartilaginous fish — family Carcharhinidae
A silvertip's arrival changes the temperature of a dive. The shape reads at distance — heavier than a grey reef shark, every fin edged in white as if dipped in paint — and the approach is pure confidence, a straight line ending in a slow bank a meter or two away. They own the deep edges of remote reefs: Osprey's North Horn, the Burma Banks, the seamounts of the Revillagigedos. Encounters feel like an audience granted rather than a sighting achieved. Slow to mature and faithful to isolated sites, silvertips vanish quickly when longlines find their banks, so the remaining strongholds sit mostly inside marine parks and far from ports.
どこで・いつ見られるか
「常駐（Resident）」とは、そのダイビングスポットでのほとんどのダイブで遭遇できることを意味します。「季節限定（Seasonal）」とは、記載された月に確実に見られることを意味します。それ以外の出会いはボーナスであり、計画の前提にはなりません。
| 目的地 | 信頼性 | 月 | メモ |
|---|---|---|---|
| Socorro & the RevillagigedosMexico | Resident — seen on most dives | 年間を通じて | |
| Coral Sea & Osprey ReefAustralia | Resident — seen on most dives | 年間を通じて | |
| Mergui ArchipelagoMyanmar | Seasonal — reliable in season | Nov–Apr | |
| RangiroaFrench Polynesia | Occasional | 年間を通じて | |
| Kimbe BayPapua New Guinea | Occasional | 年間を通じて |
ベストな月、一目でわかる
理解を深める
ハビタット: Offshore banks, seamount flanks, and steep outer-reef drop-offs, typically deeper than its reef-shark relatives
分布域: Patchy across the tropical Indo-Pacific and Eastern Pacific — East Africa, the Andaman Sea, Indonesia, Papua New Guinea, the Coral Sea, French Polynesia, and offshore Mexico and Colombia
生態・行動: The boss of the drop-off. Silvertips carry themselves with a directness that greys and blacktips lack, approaching divers head-on for a close inspection pass before resuming patrol. Every fin wears a brilliant white margin, unmistakable when the animal banks in the blue.
食性: Reef and pelagic fish, including smaller sharks and rays; frequently dominant over other species at a carcass or feed
サイズ: 目安は 1.8 m; 確認済みの最大記録 2.7 m (total length; a heavier, broader-shouldered build than the grey reef sharks it resembles).
出会ったときの正しいふるまい方
Meet the head-on approach calmly without retreating mid-pass, stay off the bait line at feeds, and keep gauges and hoses clipped tight — silvertips are known to test dangling objects.
保全
Assessed Vulnerable in 2020; isolated island populations show sharp declines wherever offshore fishing reaches, and recolonization between distant banks is slow.
目撃情報で知られるダイブサイト
動画を見る
公式チャンネルより
Best Places to Dive with Whale Sharks
Outrageously Tiny Fish
Sink or Swim? with Monét X Change | Monterey Bay Aquarium
動画はクリエイター自身のチャンネルへの埋め込みリンクです。当サイトはコンテンツをホストせず、すべての出典を明示しています。