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Somniosus rostratus A. Risso, 1827 (little sleeper shark) Somniosus sp. A Not yet described (long-nose sleeper shark) Genus Zameus D. S. Jordan & Fowler, 1903. Zameus squamulosus Günther, 1877 (velvet dogfish) Family Squalidae (dogfish sharks) Genus Cirrhigaleus S. Tanaka (I), 1912. Cirrhigaleus asper Merrett, 1973 (rough-skin spurdog)
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 .
The megamouth shark is an extremely rare species of deepwater shark, and the smallest of the three filter-feeding sharks. Since its discovery in 1976, only a few megamouth sharks have been seen, with 55 specimens known to have been caught or sighted as of 2012, including three recordings on film.
Ground sharks, like this blacknose shark, have a nictitating membrane which can be drawn over the eye to protect it. Carcharhiniformes / k ɑːr k ə ˈ r aɪ n ɪ f ɔːr m iː z / , commonly known as Ground Sharks, are the largest order of sharks , with over 270 species.
Megachasma is known from a single living species, Megachasma pelagios. [ 2 ] [ 3 ] In addition to the living M. pelagios , however, two extinct megamouth species – the Priabonian M. alisonae [ 4 ] and the Oligocene – Miocene M. applegatei – have also recently been proposed on the basis of fossilized tooth remains.
Gollum is a genus of ground sharks in the family Pseudotriakidae, native to the southwestern Pacific Ocean.The genus was described in 1973 by biologist Leonard Compagno, who named it named after the character Gollum from J. R. R. Tolkien's works, noting the species Gollum attenuatus (the slender smooth-hound) "bears some resemblance in form and habits".
The two living species are the shortfin mako shark (I. oxyrinchus) and the longfin mako shark (I. paucus). They range in length from 2.5 to 4.5 m (8.2 to 14.8 ft), [citation needed] and have an approximate maximum weight of 680 kg (1,500 lb). [citation needed] They both have a distinctive blue-gray color scheme common among mackerel sharks.
Extinct white shark tooth. Study of white shark taxonomy is complicated by nomenclature and repeated taxonomic reassignments of various species. C. hastalis, C. subserratus , and C. planus traditionally were placed in Isurus , [ 3 ] given their superficial similarity to the teeth of mako sharks, leading many modern shark tooth collectors to ...