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Alopias pelagicus, Pelagic thresher, Carcharhinus albimarginatus, Silvertip shark, (Carcharhinidae) Carcharhinus altimus, Bignose shark, (Carcharhinidae) Carcharhinus amblyrhynchos, Grey reef shark, (Carcharhinidae) Carcharhinus brevipinna, Spinner shark, (Carcharhinidae) Carcharhinus falciformis, Silky shark, (Carcharhinidae)
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 556 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in ...
The pelagic thresher (Alopias pelagicus) is a species of thresher shark, family Alopiidae; this group of sharks is characterized by the greatly elongated upper lobes of their caudal fins. The pelagic thresher occurs in the tropical and subtropical waters of the Indian and Pacific Oceans , usually far from shore, but occasionally entering ...
The three extant thresher shark species are all in the genus Alopias. The possible existence of a hitherto unrecognized fourth species was revealed during the course of a 1995 allozyme analysis by Blaise Eitner. This species is apparently found in the eastern Pacific off Baja California, and has previously been misidentified as the bigeye thresher.
In most oviparous shark species, an egg case with the consistency of leather protects the developing embryo(s). These cases may be corkscrewed into crevices for protection. The egg case is commonly called a mermaid's purse. Oviparous sharks include the horn shark, catshark, Port Jackson shark, and swellshark. [80] [82]
The longfin mako shark (Isurus paucus) is a species of mackerel shark in the family Lamnidae, with a probable worldwide distribution in temperate and tropical waters. An uncommon species, it is typically lumped together under the name "mako" with its better-known relative, the shortfin mako shark (I. oxyrinchus). The longfin mako is a pelagic ...
In a milestone decision in 2013, CITES prohibited international trade in the fins of the scalloped hammerhead (pictured) and four other shark species. [5] Shark species are increasingly becoming threatened because of commercial and recreational fishing pressures, the impact of non-shark fisheries on the seabed and shark prey species, and other ...
Currently there are 29 species listed in Annex I of the MOU, although the annex may be edited following consensus obtained at a meeting of the memorandum's signatories. [10] Currently listed: [10] Pelagic Thresher Shark (Alopias pelagicus) Bigeye Tresher Shark (Alopias superciliosus) Common Thresher Shark(Alopias vulpinus)
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