whale shark octonauts | whale shark utila
The whale shark (Rhincodon typus) is a slow-moving, filter-feeding rugs shark and the largest referred to extant fish species. The greatest confirmed individual had a length of 12. 65 m (41. 5 ft) and a weight of about 21. 5 various t (47, 000 lb).[8] The whale shark holds many files for size in the pet kingdom, most notably being certainly the largest living nonmammalian vertebrate. It is the sole member of the genus Rhincodon and the just extant member of the family Rhincodontidae which will 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 listed below 21 °C (70 °F).[2] Modeling implies a lifespan of about 70 years, but measurements possess proven difficult.[9] Whale sharks have very large mouths and are filter feeders, which is a feeding mode that happens in only two other sharks, the megamouth shark and the basking shark. They supply 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 four. 6 m (15 ft) specimen in Table Gulf, South Africa. Andrew Smith, a military doctor associated with Indian troops stationed in Hat Town, described it the subsequent year.[10] The name "whale shark" identifies the fish's size, getting as large as some types of whales,[11] and to its being a filter feeder like baleen whales.
Whale sharks have a oral cavity that can be 1 . 5 meters (4. 9 ft) wide, containing 300 to three hundred and fifty rows of tiny teeth and 10 filter pads which it uses to filter supply.[12] Unlike some other sharks, whale sharks' lips are located at the front of the brain rather than on the underside on the head.[13] Whale sharks have five significant pairs of gills. The top is wide and even with two small sight at the front. Whale sharks will be grey with a white stomach. Their skin is proclaimed with pale yellow places and stripes which are exclusive to each individual. The whale shark has three dominant ridges along its attributes. Its skin can be approximately 10 cm (3. 9 in) thick. The shark has a pair of dorsal fins and pectoral fins. Juveniles' tails have a larger high fin than the lower suite, while the adult tail turns into 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. 8 meters (32 ft) and on the lookout for t (20, 000 lb).[8] Several individuals over 18 m (59 ft) in length have been reported.[14] The largest validated specimen was caught about 11 November 1949, near Effaré Island, in Karachi, Pakistan. It was 12. 65 meters (41. 5 ft) long, weighed about 21. five t (47, 000 lb), and had a girth of seven 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 inside the popular literature, but simply no scientific records support all their existence. In 1868, the Irish natural scientist Edward cullen Perceval Wright obtained a variety of small whale shark individuals in the Seychelles, but advertised to have observed specimens in excess of 15 m (49 ft), and tells of shark individuals surpassing 21 m (69 ft).
Within a 1925 publication, Hugh M. Smith described a huge canine caught in a bamboo fish trap in Thailand in 1919. The shark was too heavy to pull ashore, nonetheless Smith estimated the shark was at least 17 meters (56 ft) long, and weighed around 37 t. These measurements have been overstated to 43 t (95, 000 lb) and a more precise 17. 98 m (59. 0 ft) recently. A shark caught in 1994 off Tainan Nation, southern Taiwan, reportedly considered 35. 8 t (79, 000 lb).[15] There have even recently been unverified claims of whale sharks of up to 23 metre distances (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 caught up on the prow of the dispatch, supposedly with 4. 6 m (15 ft) using one side and 12. 2 m (40 ft) on the other.[16] No reliable documentation exists for these statements and they remain "fish stories".
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