Modern sharks are classified within the division selachii[1] and are the sister group to the batomorphi (rays and skates). Whale sharks are the biggest shark species, but they eat tiny plankton and crustaceans Shark, any of numerous species of cartilaginous fishes that make up the order selachii (class chondrichthyes)
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Most species have a tough skin that is dull gray in color and roughened by toothlike scales.
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Sharks can rouse fear and awe like no other creature in the sea Find out about the world's biggest and fastest sharks, how sharks reproduce, and how some species are at risk of extinction. An annotated and illustrated catalogue of shark species known to date Compagno, ph.d., the world’s foremost expert on sharks and director of our board of trustees.
Although most shark species inhabit the seas, a few exceptions including the river shark and bull shark can swim both in freshwater and seawater They commonly live at depths of about 2,000 m (7,000 ft) while some can swim even deeper. You might think of a great white stalking beachgoers in a movie Or the extinct megalodon, the larges
Sharks are often characterised as vicious killers, but in reality, they’re a diverse and endangered group of creatures that add tremendous value to marine ecosystems
Despite having a reputation as vicious, bloodthirsty predators, sharks are much more benign, varied and diverse than their portrayal in popular culture suggests. There are over 400 shark species worldwide Learn how wwf protects sharks from threats like overfishing and habitat loss. There are over 400 species of sharks, each with unique features and habitats