Sharks
Pelagic Thresher Shark
Alopias pelagicus · Cartilaginous fish, family Alopiidae
The pelagic thresher looks like a shark designed by a calligrapher: huge liquid eyes, a small mouth, metallic lavender-gray flanks, and a tail that streams behind it in an impossible ribbon. At dawn over Monad Shoal, divers kneel behind rope lines in blue half-light until one rises from the deep and begins its slow carousel around a cleaning station, tail arcing with every turn. It is among diving's most graceful sights and one of its best-managed: local rules on distance and lights have kept the sharks coming for two decades. Elsewhere the species exists mostly as bycatch statistics, which the Endangered listing reflects.
어디서 언제 볼 수 있나
"상주종"은 해당 목적지에서 대부분의 다이빙 시 만날 수 있다는 뜻이고, "계절종"은 표기된 달에 안정적으로 출현한다는 뜻입니다. 그 외의 생물은 계획이 아닌 보너스로 여기세요.
| 목적지 | 신뢰도 | 월 | 참고 사항 |
|---|---|---|---|
| MalapascuaPhilippines | Resident: seen on most dives | 연중 가능 | |
| Brothers, Daedalus & St John'sEgypt | Occasional | 연중 가능 | |
| Marsa Alam & the Deep SouthEgypt | Occasional | 연중 가능 |
한눈에 보는 최적의 달
이해하기
서식지: Open ocean and deep seamount flanks; rises to shallow cleaning stations at dawn, one of the few predictable windows into its world
범위: Indo-Pacific pelagic waters from the Red Sea and East Africa to Mexico; the reliable diver encounters are at Philippine seamounts
행동 특성: A shy, wide-eyed deep-water hunter that visits cleaning stations in the dim early morning, circling patiently while cleaner wrasses work its skin and gills. The tail-slap hunting technique, confirmed on video off Cebu, is unique theater: the shark lunges, brakes, and snaps its caudal fin overhead like a whip.
먹이: Small schooling fish and squid, stunned with whip-cracks of the enormous tail before being picked off
크기: 보통 3.0 m; 최대 기록 수심 3.8 m (total length; the scythe-shaped upper tail lobe accounts for roughly half of it).
이 생물 주변에서의 행동 요령
Follow the Malapascua protocol that made these dives sustainable: stay behind the viewing lines, no flash where prohibited, minimal movement and noise, and let the shark control its circuit of the cleaning station.
보존
Endangered: slow reproduction (usually two pups) collides with heavy longline and gillnet mortality across the Indo-Pacific. The Philippines' protection of its cleaning stations is a working model of encounter-based conservation.
관련 다이브 사이트 목록
강조 표시된 사이트는 편집팀이 해당 종에 대해 직접 등록한 곳이며, 숫자는 1990년 이후 사이트 기준 약 5km 이내에서 기록된 GBIF 출현 건수입니다.
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