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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 ...
The whale shark is the largest species in this order, reaching up to 20 meters long when fully mature. [50] No other species in the order even approaches this size. The next largest species is the nurse shark (Ginglymostoma cirratum), which can grow up to 4.3 m (14 ft) across the disk and weighing more than 350 kg (770 lb). [51] Sawfish ...
The sand tiger shark (Carcharias taurus), grey/gray nurse shark, spotted ragged-tooth shark, or blue-nurse sand tiger, is a species of shark that inhabits subtropical and temperate waters worldwide. It inhabits the continental shelf, from sandy shorelines (hence the name sand tiger shark) and submerged reefs to a depth of around 191 m (627 ft). [2]
The sandbar shark (Carcharhinus plumbeus), also known as the brown shark or thickskin shark, is a species of requiem shark, and part of the family Carcharhinidae, native to the Atlantic Ocean and the Indo-Pacific. It is distinguishable by its very high first dorsal fin and interdorsal ridge. [2]
Paleontologists took a cue from retro games when naming a prehistoric shark -- they dubbed it Galagadon nordquistae after '80s arcade shooter Galaga. They bestowed the unusual name upon the newly ...
The Mediterranean sand tiger shark (Carcharias taurus europaeus), was a population of sand tiger shark that inhabited the Mediterranean Sea. Over a period of 200 years, 31 occurrence records and 54 publications provided information on the presence of the species in the area.