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The tiger shark is a member of the order Carcharhiniformes, the most species-rich order of sharks, with more than 270 species also including the small catsharks and hammerhead sharks. [4] Members of this order are characterized by the presence of a nictitating membrane over the eyes, two dorsal fins, an anal fin , and five gill slits.
Only a single species, G. cuvier, the tiger shark, is extant. [1] The earliest fossils date back to the early Eocene epoch, , around 56–47.8 Million years ago. [2] While historically considered a member of the requiem shark family Carcharhinidae, it is currently considered to be the only member of the family Galeocerdonidae. [3]
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 ...
Class Chondrichthyes. Order Carcharhiniformes. Family Carcharhinidae. Genus Carcharhinus. A group of about 50 hybrids between Australian blacktip shark and the larger common blacktip shark was found by Australia's East Coast in 2012. This is the only known case of hybridization in sharks. [1] Class Actinopterygii. Order Acipenseriformes
Galeocerdo alabamensis is an extinct relative of the modern tiger shark. Nomenclature of this shark has been debated, and recent literature identified it more closely with the Physogaleus genus of prehistoric shark, rather than Galeocerdo. The classification of Physogaleus is known as tiger-like sharks while Galeocerdo refers to
Scientists fixed tags equipped with cameras onto tiger sharks so that they could view the ocean floor from a new perspective. What they saw was astounding. How tiger sharks wearing cameras ...
The value of shark fins for shark fin soup has led to an increase in shark catches where usually only the fins are taken, while the rest of the shark is discarded, typically into the sea; health concerns about BMAA in the fins now exists regarding consumption of the soup A 4.3-metre (14 ft), 540-kilogram (1,200 lb) tiger shark caught in Kāne ...
Video above: Tail end of shark week celebrated at Shark Con. TAMPA, Fla. (WFLA) — Researchers have confirmed the existence of a new species of shark in South America.