Sharks
Whitetip Reef Shark
Triaenodon obesus · Cartilaginous fish, family Carcharhinidae
The whitetip reef shark is the reef's off-duty predator: slim, gray-brown, white-flagged on dorsal and tail tips, draped over a sand patch beneath a ledge in groups of three or six, gills sighing. Divers step over them, almost literally, on a thousand Indo-Pacific reefs. Come back after dark and the same animals hunt like ferrets, jamming into coral heads until fish panic into open water. At Cocos's Manuelita the night shift numbers in the hundreds and ranks among diving's great spectacles. Long-lived, small-littered, and reef-bound, whitetips have quietly declined across much of Southeast Asia even as protected populations thrive.
أين ومتى تراها
"مقيم" تعني أن معظم الغطسات في هذه الوجهة ستُمكّنك من مشاهدتها؛ "موسمي" تعني أنها متواجدة بشكل موثوق خلال الأشهر المذكورة؛ أي شيء آخر فهو مكسب غير متوقع، وليس شيئًا يُعتمد عليه في التخطيط.
| الوجهة | الموثوقية | الأشهر | ملاحظات |
|---|---|---|---|
| Galápagos IslandsEcuador | Resident: seen on most dives | طوال العام | |
| Sipadan & MabulMalaysia | Resident: seen on most dives | طوال العام | |
| PalauPalau | Resident: seen on most dives | طوال العام | |
| Cocos IslandCosta Rica | Resident: seen on most dives | طوال العام | |
| Tubbataha ReefsPhilippines | Resident: seen on most dives | Mar–Jun | |
| Sea of Cortez & Cabo PulmoMexico | Resident: seen on most dives | طوال العام |
أفضل شهر، في لمحة
فهمها
الموئل: Coral reefs with caves, ledges, and swim-throughs; rests by day on sand patches and inside overhangs
النطاق: Indo-Pacific and Eastern Pacific: Red Sea to Hawaii and French Polynesia, plus Cocos, Malpelo, the Galápagos, and Central American coasts
السلوك: One of the few sharks that can pump water over its gills at rest, so days are spent stacked in caves or piled on sand, dozing in loose heaps. At night the species transforms into a relentless pack hunter, writhing into crevices after sleeping fish, the basis of Cocos Island's famous night dive.
النظام الغذائي: Reef fish, octopus, crabs, and lobster extracted from holes at night with a slender, flexible body built for the job
الحجم: عادةً حوالي 1.2 m; موثَّق حتى عمق 1.7 m (total length).
كيف تتصرف في حضوره
Never block a cave mouth where sharks are resting, don't touch or prod dozing animals, and on night hunts hold your light steady off to the side rather than pinning fish for the pack.
الحفاظ على البيئة البحرية
Assessed Vulnerable in 2020; heavy inshore fishing across the Coral Triangle drives the decline, while reserves such as Cocos and Tubbataha show how quickly protected populations stabilize.
المواقع المعروفة بها
المواقع المُبرزة رسَّمها محرّرونا لهذا النوع؛ والأرقام هي سجلات ظهور GBIF المُسجَّلة في نطاق نحو 5 كم من الموقع منذ عام 1990.
شاهد
من القنوات الرسمية
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Live Aviary Cam | Monterey Bay Aquarium
مقاطع الفيديو روابط مُضمَّنة لقنوات أصحابها. لا نستضيف شيئًا ونُشير إلى المصدر في كل الأحوال.