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The whale shark (Rhincodon typus) is a slow-moving, filter-feeding floor covering shark and the largest known extant fish species. The greatest confirmed individual had a duration of 12. 65 m (41. 5 ft) and a weight of about 21. five t (47, 000 lb).[8] The whale shark holds many information for size in the dog kingdom, most notably being certainly the largest living nonmammalian vertebrate. It is the sole member of the genus Rhincodon and the only extant member of the family Rhincodontidae which belongs to the subclass Elasmobranchii in the class Chondrichthyes. Before 1984 it was classified as Rhiniodon into Rhinodontidae.
The whale shark is found in open lakes and rivers of the tropical oceans and it is rarely found in the water under 21 °C (70 °F).[2] Modeling suggests a lifespan of about 75 years, but measurements have got proven difficult.[9] Whale sharks have very large mouths and are filter feeders, which is a feeding mode that develops in only two other fishes, the megamouth shark as well as the basking shark. They give almost exclusively on plankton and small fishes, and pose no threat to humans.
The species was distinguished in April 1828 after the harpooning of a 4. 6 m (15 ft) specimen in Table Bay, South Africa. Andrew Smith, a military doctor associated with British isles troops stationed in Shawl Town, described it the following year.[10] The name "whale shark" identifies the fish's size, being as large as some species of whales,[11] as well as its being a filter feeder like baleen whales.
Whale sharks have a mouth area that can be 1 . 5 meters (4. 9 ft) extensive, containing 300 to 450 rows of tiny teeth and 10 filter pads which it uses to filter give.[12] Unlike various other sharks, whale sharks' lips are located at the front of the head rather than on the underside from the head.[13] Whale sharks have five huge pairs of gills. The top is wide and flat with two small sight at the front. Whale sharks happen to be grey with a white tummy. Their skin is marked with pale yellow areas and stripes which are exclusive to each individual. The whale shark has three dominant ridges along its sides. Its skin can be about 10 cm (3. 9 in) thick. The shark has a pair of dorsal bout and pectoral fins. Juveniles' tails have a larger upper fin than the lower b, while the adult tail turns into semilunate. The whale shark's spiracles are just behind it is eyes.
The whale shark is the largest non-cetacean animal in the world. The average size of adult whale sharks is projected at 9. 8 m (32 ft) and hunting for t (20, 000 lb).[8] Several specimens over 18 m (59 ft) in length have been reported.[14] The largest approved specimen was caught about 11 November 1949, near Humor Island, in Karachi, Pakistan. It was 12. 65 m (41. 5 ft) very long, weighed about 21. your five t (47, 000 lb), and had a girth of 7 m (23 ft).[8] Stories exist of vastly larger specimens -- quoted lengths of 18 m (59 ft) and 45. 5 t (100, 000 lb) are common in the popular literature, but not any scientific records support the existence. In 1868, the Irish natural scientist Edward Perceval Wright obtained several small whale shark individuals in the Seychelles, but said to have observed specimens around 15 m (49 ft), and tells of shark individuals surpassing 21 m (69 ft).
In a 1925 publication, Hugh Meters. Smith described a huge animal caught in a bamboo seafood trap in Thailand in 1919. The shark was too heavy to pull ashore, but Smith estimated the shark was at least 17 m (56 ft) long, and weighed around 37 testosterone levels. These measurements have been do not forget that to 43 t (95, 000 lb) and a lot more precise 17. 98 m (59. 0 ft) nowadays. A shark caught in 1994 off Tainan County, southern Taiwan, reportedly assessed 35. 8 t (79, 000 lb).[15] There have even been unverified claims of whale sharks of up to 23 metres (75 ft) and 75 tonnes (220, 000 lb). In 1934, a mail named the Maurguani discovered a whale shark in the southern Pacific Ocean, rammed that, and the shark became stuck on the prow of the mail, supposedly with 4. 6 m (15 ft) on a single side and 12. two m (40 ft) on the other.[16] No reputable documentation exists for these promises and they remain "fish stories".
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