Carpet shark

Carpet sharks are sharks classified in the order Orectolobiformes . Sometimes the common name "carpet shark" (given 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 Early Jurassic; the oldest known orectolobiform genera are Folipistrix (known from Toarcian to Aalenian of Belgium and Germany), Palaeobrachaelurus (Aalenian to Barremian) and Annea (Toarcian to Bajocian of Europe). A spiracle occurs 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. The largest carpet shark is the whale shark (Rhincodon typus) which can grow to a length of to . 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).

The methods of reproduction of carpet sharks varies. Some species are oviparous and lay eggs which may be liberated directly into the water or may be enclosed in horny egg cases. Some female sharks have been observed to push egg cases into crevices and this would be an added protection for the developing embryos. Other species are ovoviviparous and the fertilised eggs are retained in the mother's oviduct. There, the developing embryos, which are usually few in number, feed on their yolk sacs at first and later hatch out and feed on nutrients secreted by the walls of the oviduct. The young are born in an advanced state, ready to live independent lives. They are distinguished by the presence of long barbels, large spiracles, and grooves around the nostrils. They have two dorsal fins, placed close together on the back, and a relatively short tail. Blind sharks feed on small fish, cuttlefish, sea anemones, and crustaceans. The female retains the eggs in her body until they hatch (ovoviviparity), during which time the embryos feed solely on the egg yolk.

! style="background:rgb(110,110,170)" | Hemiscylliidae

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| align=center | Bamboo sharks

| align=center | 2 extant 4 extinct

| align=center | 16 extant 6 extinct

| valign=top | Bamboo sharks, sometimes called longtail carpet sharks, are distinguished by a relatively long snout with subterminal nostrils. They are relatively small sharks, with the largest species reaching only in length. They have elongated, cylindrical bodies, with short barbels and large spiracles. As their common name suggests, they have unusually long tails, exceeding the length of the rest of their bodies. They are found in shallow waters of the tropical Indo-Pacific. They are sluggish fish, feeding on bottom-dwelling invertebrates and smaller fish.

! style="background:rgb(110,110,170)" | Orectolobidae

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| align=center | Wobbegong sharks

| align=center | 3 extant 1 extinct

| align=center | 12 extant 1 extinct

| valign=top | Wobbegong sharks are well camouflaged with symmetric, bold patterns resembling a carpet. The camouflage is improved by the presence of small weed-like whisker lobes surrounding the jaw, which help to camouflage it and act as sensory barbs. Wobbegongs are bottom-dwelling and spend much time resting on the sea floor. They are found in shallow temperate and tropical waters of the western Pacific Ocean and eastern Indian Ocean, chiefly around Australia and Indonesia. Most species have a maximum length of or less, and the largest reach about in length. Wobbegongs are generally not dangerous to humans unless provoked.

! style="background:rgb(110,110,170)" | Parascylliidae

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| align=center | Collared carpet sharks

| align=center | 2

| align=center | 8

| valign=top | Collared carpet sharks have elongated, slender bodies, cat-like eyes, and barbels behind their chins. They are found only in the shallow waters of the western Pacific. They are relatively small sharks, with the largest species reaching no more than in adult length.

! style="background:rgb(110,110,170)" | Rhincodontidae

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| align=center | Whale sharks

| align=center | 1

| valign=top | The whale shark is the largest extant fish species, growing over 12 m (40 ft) long and weighing over 20 tonnes (45,000 lb). It is a slow-moving filter feeder with a very large mouth, feeding mainly, though not exclusively, on plankton. The whale shark is a pelagic species, living in the open sea in tropical and warm oceans with a lifespan around 70 years. The IUCN has assessed it as Endangered.

! style="background:rgb(110,110,170)" | Stegostomatidae

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| align=center | Zebra sharks

| align=center | 1

| valign=top | Zebra sharks are distinctive in appearance, with five longitudinal ridges on a cylindrical body, a low caudal fin comprising nearly half the total length, and a pattern of dark spots on a pale background. They grow to a length of 2.5 m (8.2 ft), and are found throughout the tropical Indo-Pacific, frequenting coral reefs and sandy flats to a depth of 62 m (210 ft). They are nocturnal and spend most of the day resting motionless on the sea floor. They are innocuous to humans. The IUCN has assessed them as endangered and their populations are likely in decline.

Extant species

Order Orectolobiformes

Family Brachaeluridae Applegate (blind sharks)
Genus Brachaelurus Ogilby, 1908
Brachaelurus colcloughi (Ogilby, 1908) (bluegrey carpetshark)
Brachaelurus waddi (Bloch & J. G. Schneider, 1801) (blind shark)
Family Ginglymostomatidae Gill, 1862 (nurse sharks)
Genus Ginglymostoma J. P. Müller & Henle, 1837
Ginglymostoma cirratum Bonnaterre, 1788 (nurse shark)
Ginglymostoma unami Del-Moral-Flores, Ramírez-Antonio, Angulo & Pérez-Ponce de León, 2015
Genus Nebrius Rüppell, 1837
Nebrius ferrugineus (Lesson, 1831) (tawny nurse shark)
Genus Pseudoginglymostoma Dingerkus, 1986
Pseudoginglymostoma brevicaudatum (Günther, 1867) (short-tail nurse shark)
Family Hemiscylliidae Gill, 1862 (bamboo sharks)
Genus Chiloscyllium J. P. Müller & Henle, 1837
Chiloscyllium arabicum Gubanov, 1980 (Arabian carpetshark)
Chiloscyllium burmensis Dingerkus & DeFino, 1983 (Burmese bamboo shark)
Chiloscyllium griseum J. P. Müller & Henle, 1838 (grey bamboo shark)
Chiloscyllium hasselti Bleeker, 1852 (Hasselt's bamboo shark)
Chiloscyllium indicum (J. F. Gmelin, 1789) (slender bamboo shark)
Chiloscyllium plagiosum (Anonymous, referred to Bennett, 1830) (white-spotted bamboo shark)
Chiloscyllium punctatum J. P. Müller & Henle, 1838 (brownbanded bamboo shark)
Genus Hemiscyllium J. P. Müller & Henle, 1837
Hemiscyllium freycineti (Quoy & Gaimard, 1824) (Indonesian speckled carpetshark)
Hemiscyllium galei G. R. Allen & Erdmann, 2008 (Cenderwasih epaulette shark)
Hemiscyllium hallstromi Whitley, 1967 (Papuan epaulette shark)
Hemiscyllium halmahera G. R. Allen, Erdmann & Dudgeon, 2013 (Halmahera epaulette shark)
Hemiscyllium henryi G. R. Allen & Erdmann, 2008 (Milne Bay epaulette shark)
Hemiscyllium ocellatum (Bonnaterre, 1788) (epaulette shark)
Hemiscyllium strahani Whitley, 1967 (hooded carpetshark)
Hemiscyllium trispeculare J. Richardson, 1843 (speckled carpetshark)
Family Orectolobidae Gill, 1896 (wobbegong sharks)
Genus Eucrossorhinus Regan, 1908
Eucrossorhinus dasypogon (Bleeker, 1867) (tasselled wobbegong)
Genus Orectolobus Bonaparte, 1834
Orectolobus floridus Last & Chidlow, 2008 (floral banded wobbegong)
Orectolobus halei Whitley, 1940.
Orectolobus hutchinsi Last, Chidlow & Compagno, 2006. (western wobbegong)
Orectolobus japonicus Regan, 1906 (Japanese wobbegong)
Orectolobus leptolineatus Last, Pogonoski & W. T. White, 2010 (Indonesian wobbegong)
Orectolobus maculatus (Bonnaterre, 1788) (spotted wobbegong)
Orectolobus ornatus (De Vis, 1883) (ornate wobbegong)
Orectolobus parvimaculatus Last & Chidlow, 2008 (dwarf spotted wobbegong)
Orectolobus reticulatus Last, Pogonoski & W. T. White, 2008 (network wobbegong)
Orectolobus wardi Whitley, 1939 (northern wobbegong)
Genus Sutorectus Whitley, 1939
Sutorectus tentaculatus (W. K. H. Peters, 1864) (cobbler wobbegong)
Family Parascylliidae Gill, 1862 (collared carpet sharks)
Genus Cirrhoscyllium H. M. Smith & Radcliffe, 1913
Cirrhoscyllium expolitum H. M. Smith & Radcliffe, 1913 (barbelthroat carpetshark)
Cirrhoscyllium formosanum Teng, 1959 (Taiwan saddled carpetshark)
Cirrhoscyllium japonicum Kamohara, 1943 (saddle carpetshark)
Genus Parascyllium Gill, 1862
Parascyllium collare E. P. Ramsay & Ogilby, 1888 (collared carpetshark)
Parascyllium elongatum Last & Stevens, 2008 (elongate carpetshark)
Parascyllium ferrugineum McCulloch, 1911 (rusty carpetshark)
Parascyllium sparsimaculatum T. Goto & Last, 2002 (ginger carpetshark)
Parascyllium variolatum (A. H. A. Duméril, 1853) (necklace carpetshark)
Family Rhincodontidae (J. P. Müller & Henle, 1839) (whale sharks)
Genus Rhincodon A. Smith, 1828
Rhincodon typus A. Smith, 1828 (whale shark)
Family Stegostomatidae Gill, 1862 (zebra sharks)
Genus Stegostoma J. P. Müller & Henle, 1837
Stegostoma fasciatum (Hermann, 1783) (zebra shark)

Fossil genera

thumb|Full body fossil of the [[Jurassic genus Phorcynis]]

The following fossil genera are recognized:

Order Orectolobiformes
Genus †Akaimia Rees, 2010
Genus †Annea Thies, 1982
Genus †Dorsetoscyllium Underwood & Ward, 2004
Genus †Galagadon Gates, Gorscak & Makovicky, 2019
Genus †Heterophorcynus Underwood & Ward, 2004
Genus †Folipistrix Kriwet, 2003
Genus †Palaeorectolobus Kriwet, 2008
Genus †Parasquatina Herman, 1982
Genus †Phorcynis Thiollière, 1854
Genus †Similiteroscyllium Fuchs, Engelbrecht, Lukeneder & Kriwet, 2017
Family Brachaeluridae
Genus †Eostegostoma Herman & Crochard, 1977
Genus †Garrigascyllium Guinot et al., 2014
Genus †Magistrauia Guinot, Cappetta & Adnet, 2014
Genus †Palaeobrachaelurus Thies, 1983
Genus †Paraginglymostoma Thies, 1982
Genus †Parahemiscyllium Guinot, Cappetta & Adnet, 2014
Family Ginglymostomatidae
Genus †Cantioscyllium Woodward, 1889
Genus †Delpitoscyllium Noubhani & Cappetta, 1997
Genus †Ganntouria Noubhani & Cappetta, 1997
Genus †Hologinglymostoma Noubhani & Cappetta, 1997
Genus †Plicatoscyllium Case & Cappetta, 1997
Genus †Protoginglymostoma Herman & Crochard, 1977
Family Hemiscyllidae
Genus †Acanthoscyllium (Pictet & Humbert, 1966)
Genus †Adnetoscyllium Guinot, Underwood, Cappetta & Ward, 2013
Genus †Almascyllium Cappetta, 1980
Genus †Notaramphoscyllium Engelbrecht, Mörs, Reguero & Kriwet, 2017
Genus †Pseudospinax Müller & Diedrich, 1991
Family †Mesiteiidae Pfeil, 2021
Genus †Mesiteia Gorjanovic-Kramberger, 1885
Family Orectolobidae
Genus †Cederstroemia Siverson, 1995
Genus †Coelometlaouia Engelbrecht, Mörs, Reguero & Kriwet, 2017
Genus †Cretorectolobus Case, 1978
Genus †Eometlaouia Noubhani & Cappetta, 2002
Genus †Gryphodobatis Leidy, 1877
Genus †Orectoloboides Cappetta, 1977
Genus †Restesia Cook et al., 2014
Genus †Squatiscyllium Cappetta, 1980
Family Parascyllidae
Genus †Pararhincodon Herman in Cappetta, 1976
Family Rhincodontidae
Genus †Palaeorhincodon Herman, 1974

References

External links

Reefquest page on carpet sharks
FishBase page on Orectolobiformes
http://www.elasmo-research.org/education/topics/d_checklist.htm

Characteristics

Extant species

Fossil genera

See also

References

Further reading

External links