Sharks
Silky Shark
Carcharhinus falciformis · Cartilaginous fish, family Carcharhinidae
Silkies are the open ocean's welcoming committee. Hang beneath a liveaboard at Daedalus or in Cuba's Jardines de la Reina and they appear from nowhere: slender, bronze-backed sharks with long tail lobes, carving smooth circles a fin's length away. Few species close distance so readily, and few wear their curiosity so plainly; a safety stop can turn into twenty minutes of orbiting escort. They are also among the most heavily fished sharks on Earth, hauled up in vast numbers on tuna longlines and purse seines, which makes the confident crowds at protected seamounts feel like dispatches from an older ocean.
Di mana dan kapan melihatnya
"Resident" berarti sebagian besar penyelaman di destinasi tersebut akan menjumpai mereka; "seasonal" berarti kehadirannya dapat diandalkan pada bulan-bulan yang tercantum; selain itu adalah bonus, bukan rencana.
| Destinasi | Keandalan | Bulan | Catatan |
|---|---|---|---|
| Cocos IslandCosta Rica | Resident: seen on most dives | Sepanjang tahun | |
| Socorro & the RevillagigedosMexico | Resident: seen on most dives | Sepanjang tahun | |
| Jardines de la ReinaCuba | Resident: seen on most dives | Sepanjang tahun | |
| MalpeloColombia | Resident: seen on most dives | Sepanjang tahun | |
| Brothers, Daedalus & St John'sEgypt | Seasonal: reliable in season | May–Oct |
Bulan terbaik, sekilas pandang
Memahaminya
Habitat: Warm open ocean over deep water; gathers around seamounts, offshore reefs, drifting objects, and anchored boats
Sebaran: Circumtropical: one of the most abundant large sharks of the world's warm offshore waters, from the Caribbean and Eastern Pacific to the Red Sea and central Pacific
Perilaku: Fast, sleek, and inquisitive, named for the fine, smooth texture of its skin. Silkies materialize around boats and safety stops in open water, circling divers closely and persistently, especially toward dusk. Around baitballs they switch to quick, slashing runs.
Diet: Schooling fish such as tuna and mackerel, plus squid; often follows baitballs and tuna schools
Ukuran: biasanya sekitar 2.2 m; terdokumentasi hingga 3.3 m (total length).
Cara berperilaku di sekitarnya
Keep the group compact during drifting safety stops, avoid low-light surface swims where silkies are working bait, and never spearfish from a liveaboard mooring they patrol.
Konservasi
Vulnerable and declining: silkies are the most common shark in the global fin trade and dominate tuna-fishery bycatch. CITES Appendix II listing now regulates international trade.
Situs-situs terdata yang dikenal dengan hal itu
Lokasi yang disorot dipetakan untuk spesies ini oleh editor kami; angka-angkanya adalah catatan kemunculan GBIF yang dicatat dalam radius sekitar 5 km dari suatu lokasi sejak 1990.
Tonton
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