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Frilled sharks contain only two extant species of deepsea creatures which are typically weakened in areas closer to the surface. The most widely known species still surviving is the frilled shark, known as a living fossil, along with the Southern African frilled shark, found along coastal areas of South Africa. Several extinct species are known.
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 ...
Most shark reports concern the more common varieties, but there are more than 400 known species of sharks, and some of them are very rare. Frilled sharks, often called 'living fossils' are one of ...
The body of this shark is small, slim, and fusiform in shape. As the name suggests, this shark has six gill slits, unusual among most shark species. The head is narrow and somewhat flattened, and the mouth contains 5 rows of large, comb-shaped teeth. This shark's single dorsal fin is pushed back towards the caudal fin, and is behind the pelvic ...
Scientists from the Shark Specialist Group, a division of the International Union for the Conservation of Nature, said that 16 per cent of ghost shark species are “threatened” or “near ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 22 December 2024. Family of sharks Hammerhead sharks Temporal range: Early Miocene – recent Pre๊ ๊ O S D C P T J K Pg N Scalloped hammerhead Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Chondrichthyes Subclass: Elasmobranchii Order: Carcharhiniformes ...
The crocodile shark (Pseudocarcharias kamoharai) is a species of mackerel shark and the only extant member of the family Pseudocarchariidae. A specialized inhabitant of the mesopelagic zone , the crocodile shark can be found worldwide in tropical waters from the surface to a depth of 590 m (1,940 ft).
A weird fact is that honey never spoils; archaeologists have found pots of honey in ancient Egyptian tombs that are over 3,000 years old and still perfectly good to eat! Image credits: MysticMelo24 #7