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Portal:Sharks

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The sharks portal

Welcome to the shark portal!
Welcome to the shark portal!

Sharks (superorder Selachimorpha) are a group of fish species with a full cartilaginous skeleton. There are over 400 extant species of shark, as well as numerous extinct species known from recovered teeth and bones. Due partially to fear of shark attack, sharks often feature heavily in popular culture.

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Fossilised Megalodon jaws at the American Museum of Natural History, New York
The megalodon (/ˈmɛɡələdɒn/ MEG-ə-lə-don; from Greek: μέγας ὀδούς, "big tooth"), Carcharodon megalodon or Carcharocles megalodon (in dispute), was a giant shark that lived in prehistoric times. The oldest remains of this species found are about 18 million years old and C. megalodon became extinct in the Pleistocene epoch probably about 1.5 million years ago. It was the apex predator of its time and is the largest carnivorous fish known to have existed.

C. megalodon could grow more than 18 metres (59 ft) long and is also quite possibly the largest shark ever to exist. From scrutiny of its remains, scientists conclude that C. megalodon belongs to the order Lamniformes. However, scientists are still debating which genus would be most appropriate for C. megalodon from the two proposed. Fossil evidence has revealed that megalodon fed upon large marine animals.

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Carcharhinus melanopterus Luc Viatour.jpg
Credit: Luc Viatour
The blacktip reef shark is a species of requiem shark, family Carcharhinidae, easily identified by the prominent black tips on its fins. It is among the most abundant sharks inhabiting the tropical coral reefs of the Indian and Pacific Oceans, and prefers shallow, inshore waters.

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Categories

Topics

Shark · Outline of sharks

Shark orders
Carcharhiniformes (groundsharks) · Cladoselachiformes (extinct) · Eugeneodontida (extinct) · Heterodontiformes (bullhead sharks) · Hexanchiformes (most primitive sharks) · Hybodontiformes (extinct) · Iniopterygia (extinct) · Lamniformes (mackerel sharks) · Orectolobiformes (carpet sharks and relatives) · Pristiophoriformes (sawsharks and relatives) · Squaliformes (gulper sharks, bramble sharks, lantern sharks, rough sharks, sleeper sharks, dogfish sharks and relatives) · Squatiniformes (angel sharks) · Symmoriida (extinct) · Xenacanthida (also known as Xenacantiformes, extinct)


Major species
Basking shark · Blue shark · Bull shark · Great hammerhead · Great white shark · Grey reef shark · Hammerhead shark · Megalodon · Megamouth shark · Nurse shark · Oceanic whitetip shark · Requiem shark · Scalloped hammerhead · Shortfin mako shark · Swellshark · Thresher shark · Tiger shark · Whale shark


Shark biology
Ampullae of Lorenzini · Mermaid's purses · Physical characteristics of sharks · Shark teeth · Shark threat display


Shark-human interaction
Attack (drum lines, International Shark Attack File, Jersey Shore shark attacks of 1916, list of fatal, unprovoked shark attacks in the United States, shark net, shark proof cage, shark suit, Summer of the Shark· Captivity (shark tunnel· Conservation (grey nurse shark conservation, Shark Alliance, Shark Conservation Act, Shark Trust· Fishing (International Land-Based Shark Fishing Association, land-based shark fishing· Products (shark cartilage, shark finning, shark fin soup, shark liver oil)

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Sharks on Wiktionary     Sharks on Wikimedia Commons     Sharks on Wikispecies    
Definitions Images & Media Species directory



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