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The first shark-like chondrichthyans appeared in the oceans 400 million years ago, [1] developing into the crown group of sharks by the Early Jurassic. [2] Listed below are extant species of shark. Sharks are spread across 512 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in ...
Sharkbook is a global database for identifying and tracking sharks, particularly whale sharks, using uploaded photos and videos.In addition to identifying and tracking sharks, the site allows people to "adopt a shark" and get updates on specific animals.
Common name Scientific name Geographic range Conservation status IUCN Red List Length Image Blacknose shark: Carcharhinus acronotus (Poey, 1860) Endangered 1.3 m (4.3 ft) Silvertip shark: Carcharhinus albimarginatus (Rüppell, 1837) Vulnerable 2–2.5 m (6.6–8.2 ft) maximum 3 m (9.8 ft) Bignose shark: Carcharhinus altimus (S. Springer, 1950)
A shark, also called a "selachimorph", can be described as all of the following: Animal – multicellular, eukaryotic organism of the kingdom Animalia or Metazoa. An animal's body plan eventually becomes fixed as it develops, although some types of animal undergo a process of metamorphosis later on in their life.
They are heavily built sharks, sometimes weighing nearly twice as much as sharks of comparable length from other families. Many in the family are among the fastest-swimming fish. Megachasmidae: Megamouth sharks: 1 1 The megamouth shark is an extremely rare species of deepwater shark, and the smallest of the three filter-feeding sharks.
The white-spotted Izak or African spotted catshark (Holohalaelurus punctatus) is a species of shark belonging to the family Pentanchidae, the deepwater catsharks.It is found in the western Indian Ocean off the coasts of Natal, South Africa, southern Mozambique, Madagascar, Kenya, and Tanzania between latitudes 4° S and 37° S, at depths of between 220 and 440 m.
The Lamnidae are the family of mackerel sharks known as white sharks. [2] They are large, fast-swimming predatory fish found in oceans worldwide, though they prefer environments with colder water. The name of the family is formed from the Greek word lamna , which means "fish of prey", and was derived from the Greek legendary creature , the Lamia .
Glyphis hastalis is a species of extinct river shark from Great Britain. [ 1 ] [ 2 ] Modern relatives include the Ganges shark and speartooth shark . References