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Whale shark (Rhincodon typus) - Printable Version

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Whale shark (Rhincodon typus) - epaiva - 10-18-2017

The whale shark (Rhincodon typus) is a slow-moving filter-feeding carpet shark and the largest known extant fish species. The largest confirmed individual had a length of 12.65 m (41.5 ft) and a weight of about 21.5 t (47,000 lb). The whale shark holds many records for sheer size in the animal kingdom, most notably being by far the largest living nonmammalian vertebrate.
Whale sharks have a mouth that can be 1.5 m (4.9 ft) wide, containing 300 to 350 rows of tiny teeth and 10 filter pads which it uses to filter feed. Whale sharks have five large pairs of gills. The head is wide and flat with two small eyes at the front. Whale sharks are grey with a white belly. Their skin is marked with pale yellow spots and stripes which are unique to each individual. The whale shark has three prominent ridges along its sides. Its skin can be up to 10 cm (3.9 in) thick. The shark has a pair of dorsal fins and pectoral fins. Juveniles' tails have a larger upper fin than lower fin, while the adult tail becomes semilunate. The whale shark's spiracles are just behind its eyes.
The whale shark is the largest non-cetacean animal in the world. The average size of adult whale sharks is estimated at 9.7 m (31.82 ft) and 9 t (20,000 lb). Several specimens over 18 m (59.05 ft) in length have been reported. The largest verified specimen was caught on 11 November 1947, near Baba Island, in Karachi, Pakistan. It was 12.65 m (41.50 ft) long, weighed about 21.5 t (47,000 lb), and had a girth of 7 m (23.0 ft).
credits to @flyingkiwiontheroad @amo_denise @hkalex83 and @nimusao


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RE: Whale shark (Rhincodon typus) - epaiva - 10-18-2017

The whale shark is a filter feeder – one of only three known filter-feeding shark species (along with the basking shark and the megamouth shark). It feeds on plankton including copepods, krill, fish eggs, Christmas Island red crab larvae and small nektonic life, such as small squid or fish. It also feeds on clouds of eggs during mass spawning of fish and corals. The many rows of vestigial teeth play no role in feeding. Feeding occurs either by ram filtration, in which the animal opens its mouth and swims forward, pushing water and food into the mouth, or by active suction feeding, in which the animal opens and closes its mouth, sucking in volumes of water that are then expelled through the gills. In both cases, the filter pads serve to separate food from water. These unique, black sieve-like structures are presumed to be modified gill rakers. Food separation in whale sharks is by cross-flow filtration, in which the water travels nearly parallel to the filter pad surface, not perpendicularly through it, before passing to the outside, while denser food particles continue to the back of the throat. This is an extremely efficient filtration method that minimizes fouling of the filter pad surface. Whale sharks have been observed "coughing", presumably to clear a build-up of particles from the filter pads. Whale sharks migrate to feed and possibly to breed.
The whale shark is an active feeder, targeting concentrations of plankton or fish. It is able to ram filter feed or can gulp in a stationary position. This is in contrast to the passive feeding basking shark, which does not pump water. Instead, it swims to force water across its gills.
credits to @james_travel_and_tours @chicdiving @gramatilla and @never_for_naught


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RE: Whale shark (Rhincodon typus) - epaiva - 01-11-2018

Huge Whale Shark
credit to @whale_life_us


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RE: Whale shark (Rhincodon typus) - epaiva - 01-14-2018

Credit to @shark_lovers_of_insta


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