|
| regnum = Animalia | phylum = Chordata | classis = Chondrichthyes | subclassis = Elasmobranchii | superordo = Selachimorpha | ordo = Orectolobiformes | ordo_authority = Applegate, 1972 | subdivision_ranks = Families | subdivision = See text }} Carpet sharks are sharks classified in the order Orectolobiformes. Sometimes the common name "carpet shark" (named so because many species resemble ornately patterned carpets) is used interchangeably with "wobbegong," which is the common name of sharks in the family Orectolobidae. Carpet sharks have five gill slits, two spineless dorsal fins, and a small mouth that does not extend past the eyes. Many species have barbels. ==Characteristics== The carpet sharks are a diverse group of sharks with differing sizes, appearances, diets and habits. They first appeared in the fossil record in the late Jurassic.〔 All species have two dorsal fins and a relatively short transverse mouth that does not extend behind the eyes. Besides the nostrils are barbels, tactile sensory organs, and grooves known as nasoral grooves connect the nostrils to the mouth. There are five short gill slits just in front of the origin of the pectoral fin and the fifth slit tends to overlap the fourth one. There is a spiracle beneath each eye which is used in respiration. The only exception to this rule is the whale shark, the spiracles of which are situated just behind the eyes. Carpet sharks derive their common name from the fact that many species have a mottled appearance with intricate patterns reminiscent of carpet designs. The patterning provides camouflage when the fish is lying on the seabed.〔(【引用サイトリンク】title=Carpet shark )〕 The largest carpet shark is the whale shark (''Rhincodon typus'') which can grow to a length of . It is the largest species of fish but despite its size is not dangerous, as it is a filter feeder, drawing in water through its wide mouth and sifting out the plankton. The smallest carpet shark, at up to about long, is the barbelthroat carpet shark, (''Cirrhoscyllium expolitum'').〔 Some of the most spectacularly coloured members of the order are the necklace carpet shark (''Parascyllium variolatum''), the zebra shark (''Stegostoma fasciatum'') and the ornate wobbegong (''Orectolobus ornatus''). Nurse sharks and whale sharks have a fringe of barbels on their snout, and barbelthroat carpet sharks (''Cirrhoscyllium expolitum'') have barbels dangling from the throat region.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Carpet shark」の詳細全文を読む スポンサード リンク
|