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.
इसे कहाँ और कब देखें
"निवासी" का अर्थ है कि उस गंतव्य पर अधिकांश डाइव्स में उनसे मुलाकात होती है; "मौसमी" का अर्थ है कि वे सूचीबद्ध महीनों में विश्वसनीय रूप से मौजूद रहते हैं; इसके अलावा जो भी मिले वह बोनस है, योजना नहीं।
| गंतव्य | विश्वसनीयता | माह | नोट्स |
|---|---|---|---|
| MalapascuaPhilippines | Resident — seen on most dives | साल भर | |
| Brothers, Daedalus & St John'sEgypt | Occasional | साल भर | |
| Marsa Alam & the Deep SouthEgypt | Occasional | साल भर |
एक नज़र में सर्वश्रेष्ठ महीना
इन्हें समझना
आवास: Open ocean and deep seamount flanks; rises to shallow cleaning stations at dawn, one of the few predictable windows into its world
रेंज: Indo-Pacific pelagic waters from the Red Sea and East Africa to Mexico; the reliable diver encounters are at Philippine seamounts
व्यवहार: 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.
आहार: Small schooling fish and squid, stunned with whip-cracks of the enormous tail before being picked off
आकार: आमतौर पर लगभग 3.0 m; दर्ज अधिकतम गहराई 3.8 m (total length — the scythe-shaped upper tail lobe accounts for roughly half of it).
इसके आसपास कैसे व्यवहार करें
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.
संरक्षण
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.
इनके लिए जाने-जाने वाले चार्टेड साइट
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वीडियो उनके निर्माताओं के अपने चैनलों के एम्बेडेड लिंक हैं — हम कुछ होस्ट नहीं करते और सब का क्रेडिट देते हैं।