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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 ...
Megalodon teeth can measure over 180 millimeters (7.1 in) in slant height (diagonal length) and are the largest of any known shark species, [29]: 33 implying it was the largest of all macropredatory sharks. [35] In 1989, a nearly complete set of megalodon teeth was discovered in Saitama, Japan.
The whale shark (Rhincodon typus) is a slow-moving, filter-feeding carpet shark and the largest known extant fish species. The largest confirmed individual had a length of 18.8 m (61.7 ft). [8] The whale shark holds many records for size in the animal kingdom, most notably being by far the most massive living non-cetacean animal.
The giant guitarfish is largest species in the skate order The largest and most diverse order of rays' largest species is the giant guitarfish (Rhynchobatus djiddensis) of the Red Sea and the eastern Indian ocean. The top size of the species is 227 kg (500 lb) and 3.1 m (10 ft). [58] The largest of the skates is the common skate (Dipturus batis ...
10: Great white shark: Carcharodon carcharias: 7.1 (disputed) [10] [11] [12] 11: Pacific sleeper shark: Somniosus pacificus: 7 [13] 12: Common thresher shark: Alopias vulpinus: 6.5 [14] 13: Goblin shark: Mitsukurina owstoni: 6.2 [15] 14: Great hammerhead shark: Sphyrna mokarran: 6.1 [16] 15: White sturgeon: Acipenser transmontanus: 6.1 [17] 16 ...
The basking shark (Cetorhinus maximus) is the second-largest living shark and fish, [4] after the whale shark. It is one of three plankton-eating shark species, along with the whale shark and megamouth shark. Typically, basking sharks reach 7.9 m (26 ft) in length.
Shark research is hard to get funding for, in part, because sharks aren’t a commercial species. Yet the irony is that they affect commercial species, namely fish populations.
The basking shark is the second largest living fish, after the whale shark, and the second of three plankton-eating sharks, the other two being the whale shark and megamouth shark. It is a cosmopolitan migratory species , found in all the world's temperate oceans.