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File:Symbol question.svg ... that while the origin of recent shark attacks in Egypt (species pictured) is unknown, experts cite overfishing and illegal dumping of animal carcasses as possible causes? (2010-12-28)
File:Symbol question.svg ... that the catsharks of the genus Galeus—G. antillensis, G. arae, G. atlanticus, G. cadenati, G. eastmani, G. gracilis, G. longirostris, G. melastomus, G. mincaronei, G. murinus, G. nipponensis, G. piperatus, G. polli, G. priapus, G. sauteri, G. schultzi, and G. springeri—have "saws" on their tails? (2010-11-11)
File:Symbol question.svg ... that the extinct giant thresher shark Alopias palatasi is the only one of its kind to possess serrated teeth (pictured)? (2020-01-01)
File:Symbol question.svg ... that the ampullae of Lorenzini enable sharks to sense electric fields? (2022-10-10)
File:Symbol question.svg ... that male Arabian carpetsharks competing for a mate have been known to bite the claspers of their rivals? (2010-02-11)
File:Symbol question.svg ... that the whitefin, Cook's, Australian reticulate, spotted, leopard-spotted, painted, flagtail, speckled, saddled, and narrowbar swellsharks were all scientifically described in 2008, more than doubling the number of species in the genus Cephaloscyllium (example pictured)? (2010-02-25)
File:Symbol question.svg ... that Figaro was brought back in 2008 for the Australian and northern sawtail catsharks? (2010-10-17)
File:Symbol question.svg ... that the Australian swellshark (pictured) can survive out of water for more than a day? (2009-09-14)
File:Symbol question.svg ... that juvenile balloon sharks are preyed upon by the coelacanth? (2010-11-06)
File:Symbol question.svg ... that the barbeled houndshark is the only shark with a spherical placenta? (2010-01-31)
File:Symbol question.svg ... that the presence of the rare bigeye sand tiger in the Pacific Ocean was first suspected based on teeth recovered from the ocean floor? (2009-04-27)
File:Symbol question.svg ... that discards from commercial fishing ships are a major food source for black dogfish in the northwestern Atlantic? (2010-10-10)
File:Symbol question.svg ... that the blackspot shark feeds on small fish, crustaceans and squid and is not dangerous to man? (2013-06-28)
File:Symbol question.svg ... that most attacks on humans by the blacktip reef shark (pictured) consist of people being bitten on their legs or feet while wading in shallow water? (2009-10-08)
File:Symbol question.svg ... that the blacktip shark (pictured) can reproduce asexually? (2009-05-06)
File:Symbol question.svg ... that the blind shark (pictured) and the bluegrey carpetshark close their eyes when taken out of the water? (2010-02-11)
File:Symbol question.svg ... that the blotched catshark exhibits fluorescence, with spots that glow yellow under blue light? (2009-08-07)
File:Symbol question.svg ... that the blurred and smooth lanternsharks form a species group distinguished from the rest of their family by the shape and arrangement of their dermal denticles? (2009-09-28)
File:Symbol question.svg ... that the deepwater boa and dwarf catsharks are seldom caught by trawlers in the Caribbean Sea and the western Atlantic? (2016-07-24)
File:Symbol question.svg ... that the endangered Borneo shark was rediscovered in 2007, after not having been seen for many decades? (2010-05-06)
File:Symbol question.svg ... that almost a quarter of the brown lanternsharks found in Suruga Bay, Japan, have both male and female organs? (2009-07-17)
File:Symbol question.svg ... that the dark, puffadder, brown, and Natal shysharks (puffadder shyshark pictured) of South Africa are so named because they curl into a ring when threatened and "shyly" cover their eyes with their tails? (2009-09-08)
File:Symbol question.svg ... that although most carpet sharks eat small prey such as shellfish, one was observed swallowing a bamboo shark whole? (2013-10-17)
File:Symbol question.svg ... that the lollipop catshark is shaped like a tadpole and has an almost gelatinous body? (2009-09-13)
File:Symbol question.svg ... that the cookiecutter shark (pictured) may use the absence of bioluminescence to attract prey? (2010-02-08)
File:Symbol question.svg ... that schools of copper sharks (pictured) follow the sardine run off South Africa every winter? (2010-04-29)
File:Symbol question.svg ... that the egg capsule of the crested bullhead shark has paired tendrils extending up to 2 m (6.6 ft), greater than the length of the adult shark? (2009-11-06)
File:Symbol question.svg ... that the daggernose shark can adjust the timing of events in its reproductive cycle by several months? (2009-09-10)
File:Symbol question.svg ... that the draughtsboard shark (pictured) has been known to bark like a dog? (2010-02-20)
File:Symbol question.svg ... that the spined pygmy shark (head pictured), dwarf lanternshark and pygmy ribbontail catshark are candidates for being the smallest shark in the world, all maturing at under 20 cm (8 in) long? (2009-10-03)
File:Symbol question.svg ... that the epaulette shark (pictured) can survive for an hour without oxygen? (2009-05-21)
File:Symbol question.svg ... that during the summer the finetooth shark (pictured) is found exclusively in water less than 10 m (30 ft) deep? (2009-05-13)
File:Symbol question.svg ... that the frilled shark (pictured) may have the longest gestation period of any vertebrate, at three and a half years? (2010-05-04)
File:Symbol question.svg ... that the graceful shark has been described as "tubby"? (2010-05-09)
File:Symbol question.svg ... that the green lanternshark often preys on squid and octopus much larger than itself, which it may overwhelm by attacking in packs? (2009-09-27)
File:Symbol question.svg ... that the greeneye spurdog, Sydney skate, grey skate and whitefin swellshark are at risk of extinction by trawling, according to a 2021 report? (2021-04-07)
File:Symbol question.svg ... that the grey reef shark (pictured) is the first shark species known to perform a threat display to warn off divers who are too close? (2009-05-10)
File:Symbol question.svg ... that relative to its body size, the horn shark (pictured) has the strongest known bite of any shark? (2009-06-23)
File:Symbol question.svg ... that the single known specimen of the Irrawaddy river shark was generally dismissed as an abnormal bull shark until 2005? (2009-11-16)
File:Symbol question.svg ... that several Japanese bullhead sharks may lay their eggs in a single communal "nest"? (2009-11-06)
File:Symbol question.svg ... that the Jersey Shore shark attacks of 1916 killed four people and inspired Peter Benchley's novel Jaws (1974)? (2007-08-03)
File:Symbol question.svg ... that, like the related cookiecutter shark, the kitefin shark (pictured) sometimes feeds by taking bites out of animals larger than itself? (2009-06-20)
File:Symbol question.svg ... that the largetooth cookiecutter shark has the largest teeth relative to its body of any living shark? (2009-09-26)
File:Symbol question.svg ... that the leopard shark (pictured) feeds on anchovies by swimming into their schools with its mouth open and waiting for them to accidentally enter? (2009-08-20)
File:Symbol question.svg ... that the lizard catshark is considered a "vulnerable species" because trawling is damaging the patches of coral in which it breeds? (2014-10-05)
File:Symbol question.svg ... that the Memorandum of Understanding on the Conservation of Migratory Sharks, brought into force in 2010, was the first global instrument that dealt with migratory sharks? (2012-03-06)
File:Symbol question.svg ... that installation of the Middleton Beach shark barrier in Albany, Western Australia was delayed when sharks attacked pygmy whales just a few meters from the beach? (2016-04-09)
File:Symbol question.svg ... that the milk shark is so named because of a belief in India that eating its meat improves lactation? (2009-09-16)
File:Symbol question.svg ... that although the prehistoric shark Nanocetorhinus is named for the resemblance of its teeth to miniature Cetorhinus teeth, there is no evidence the two genera are closely related? (2012-05-07)
File:Symbol question.svg ... that more than 90 percent of the night sharks (pictured) caught off northeastern Brazil contain mercury concentrations higher than that considered safe by the local government? (2009-09-21)
File:Symbol question.svg ... that no more than 250 mature northern river sharks are estimated to live in the wild? (2010-01-15)
File:Symbol question.svg ... that the rough skin of the nursehound (pictured) was once used as an abrasive called "rubskin", which cost a hundred times more than sandpaper? (2009-07-27)
File:Symbol question.svg ... that a specimen of the ornate wobbegong was observed to have its full set of teeth and be able to defend itself at one day old? (2019-03-01)
File:Symbol question.svg ... that Ornithoprion was studied primarily using X-rays of its fossils? (2024-12-03)
File:Symbol question.svg ... that at night, the Pacific angelshark (pictured) may use bioluminescent plankton to target its prey? (2009-06-24)
File:Symbol question.svg ... that the Pondicherry shark was last seen in 1979? (2010-04-10)
File:Symbol question.svg ... that the porbeagle (pictured) has been known to "play" with kelp fronds, pieces of wood, and fishing floats? (2010-02-16)
File:Symbol question.svg ... that the pyjama shark and the leopard catshark (pictured) ambush chokka squid by hiding in the squid's spawning grounds? (2010-05-28)
File:Symbol question.svg ... that the school shark was at one time used as a source of vitamin A as its liver was shown to have higher levels of this vitamin than any other fish tested? (2013-09-25)
File:Symbol question.svg ... that shark bite victims have met with U.S. Senators to express their support for the Shark Conservation Act, which is pending approval by the Senate? (2009-07-22)
File:Symbol question.svg ... that shark threat display is an exaggerated swimming style exhibited by some sharks when they perceive they are in danger? (2006-11-08)
File:Symbol question.svg ... that British chef Gordon Ramsay, who was threatened at gunpoint whilst filming in Costa Rica, described the illegal shark fin trading in the country as "a multi-billion dollar industry"? (2011-01-10)
File:Symbol question.svg ... that in Eastern Africa and islands in the Indian Ocean, shark meat (pictured) has been a significant source of protein for centuries? (2015-09-16)
File:Symbol question.svg ... that the international trade in shark fins of five species of threatened sharks, such as the scalloped hammerhead, has come under international protection? (2013-03-20)
File:Symbol question.svg ... that individual smalltooth sand tigers have been documented returning to the same location off Lebanon every summer? (2009-05-04)
File:Symbol question.svg ... that the southern African frilled shark preys mainly on smaller sharks, which it swallows whole with its greatly distensible mouth? (2009-09-20)
File:Symbol question.svg ... that the spadenose shark (pictured) exhibits the most advanced form of placental reproduction in fishes? (2009-09-06)
File:Symbol question.svg ... that it is uncertain where adult speartooth sharks (pictured) live, as none have been captured? (2010-09-23)
File:Symbol question.svg ... that fish found in the demersal zone include the spiny-back eel (pictured), the whitesaddled and speckled catshark, the whitenose whipray, and the whitespotted grouper? (2016-08-01)
File:Symbol question.svg ... that the spinner shark is named for the spinning leaps it makes out of the water as part of its feeding strategy? (2009-05-16)
File:Symbol question.svg ... that the spot-tail shark can produce as many as eight pups after a gestation period of ten months? (2014-09-04)
File:Symbol question.svg ... that the spotted houndshark, the speckled smooth-hound and the humpback smooth-hound are known as "tollo" and used for human consumption? (2014-09-09)
File:Symbol question.svg ... that prey of the spotted wobbegong (pictured) have been known to approach its mouth and nibble on its tentacles? (2019-02-27)
File:Symbol question.svg ... that Squatina mapama was named after Spain's Ministry of Agriculture and Fisheries, Food and Environment? (2022-03-02)
File:Symbol question.svg ... that the Canary Islands are one of the few places left where there are still substantial numbers of angelsharks (pictured), once common all around Europe? (2009-07-17)
File:Symbol question.svg ... that the starry smooth-hound is not a heavenly body or a dog? (2013-09-06)
File:Symbol question.svg ... that the swellshark bends its body in a U-shape and sucks in water to double in size and avoid attacks from predators? (2009-06-21)
File:Symbol question.svg ... that the taillight shark has a gland on its belly that releases clouds of luminescent blue fluid? (2009-06-24)
File:Symbol question.svg ... that when captured, the tawny nurse shark (pictured) often spits a jet of water into the faces of its captors? (2009-06-14)
File:Symbol question.svg ... that the United States once fought 32 tons of shark fins, and the fins won? (2012-04-01)
File:Symbol question.svg ... that the velvet belly lantern shark (pictured) has proteins in its liver that can detoxify heavy metals such as cadmium, copper, mercury, and zinc? (2009-07-02)
File:Symbol question.svg ... that the Yellowspotted catshark and the West African catshark both lay eggs enclosed in egg cases? (2013-09-04)
File:Symbol question.svg ... that Mustelus hacat is a species of smooth-hound shark discovered in 2003 in the Sea of Cortez, off the coast of Mexico? (2006-03-08)
File:Symbol question.svg ... that the female whitecheek shark gives birth to a litter of up to four live young? (2013-10-14)
File:Symbol question.svg ... that the whitefin dogfish has light-producing organs on its upper eyelids? (2009-03-16)
File:Symbol question.svg ... that the zebra shark (pictured) is striped when young and spotted when mature? (2009-05-20)
File:Symbol question.svg ... that the Australian angelshark is not easily caught by line-fishing or netting because it usually lies immersed in the sediment on the seabed? (2013-09-28)
File:Symbol question.svg ... that the first successful artificial insemination of a shark was performed in the cloudy catshark (pictured)? (2009-04-28)
File:Symbol question.svg ... that the newly described Galápagos catshark differs from other catsharks by having an asymmetric pattern of spots? (2012-03-16)
File:Symbol question.svg ... that the longhead catshark is the only known cartilaginous fish that normally has both male and female reproductive systems? (2010-10-26)
File:Symbol question.svg ... that narrowmouthed catsharks are unusual in displaying heterodont dentition, with males and females having differently shaped mouths and teeth? (2016-07-21)
File:Symbol question.svg ... that the narrowtail catshark is thought to be a pedomorphic dwarf? (2016-06-29)
File:Symbol question.svg ... that although the slender catshark only grows to about 70 centimetres (28 in), the dermal denticles of other sharks have been found in its stomach? (2013-10-19)
File:Symbol question.svg ... that the Portuguese dogfish (pictured) is the deepest-living shark known, found as far down as 3,675 m (2.284 mi)? (2009-11-16)
File:Symbol question.svg ... that the Galapagos shark is often the most abundant shark around oceanic islands? (2009-05-05)
File:Symbol question.svg ... that the closure of the Tethys Sea 10–14 million years ago led to the sicklefin lemon shark (pictured) and the lemon shark becoming separate species? (2009-09-03)
File:Symbol question.svg ... that the whitetip reef shark (pictured) may have contributed to the Hawaiian myth of ʻaumākua, family guardian spirits, due to the "loyalty" of sharks that stay in the same area for years? (2009-08-18)
File:Symbol question.svg ... that the silky shark (pictured) is the most common source of ornamental shark jaws sold to tourists in the tropics? (2009-09-18)
File:Symbol question.svg ... that the flesh and fins of the spotless smooth-hound are much esteemed? (2014-08-28)