Sharks

Feared by most, loved my some and hunted by many, sharks are one of the most mysterious groups of creatures roaming the Earth today. Defined as a fish with a full cartilaginous skeleton and a sleek, streamlined body, a shark can range in size from the two foot pygmy shark, to the colossal 50-foot whale shark. There are more than 250 different species of sharks currently identified, making it one of the most diverse animal genera on the planet. Sharks are found in every major body of saltwater in the world, but are more common in warmer waters. There are a small number of shark species that do thrive in fresh water, and certain sharks have been known to venture from their saltwater homes to major freshwater lakes and rivers. Most members of the Shark family are predatory, though some are more ferocious than others. Ironically, the largest of the shark species, the whale shark and basking shark, are virtually harmless plankton eaters. Sharks have an extraordinary sense of smell when it comes to hunting prey, and have been known to be able to sense visually undetectable amounts of animal blood dispersed into the water from considerable distances.
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Mysterious Wanderings of Tiger Sharks Tracked
Tiger Shark Restrained Underwater
January 8th, 2014
A new four-year study of tiger sharks off the coast of Australia has revealed patterns in the animals' mysterious migratory wanderings, including curious differences based on the gender and age of the sharks.
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Great White Shark On Historic Marathon Migration
shark tagging, white sharks
March 7th, 2014
Lydia the great white shark has migrated more than 19,000 miles since being tagged.
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Captive Shark Ray Gives Birth to Septuplets
shark ray pup, Sweet Pea, captive birth
January 30th, 2014
Sweet Pea, a shark ray, just gave birth to seven pups, making her the first shark ray in captivity to successfully give birth.
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Say Aahhh! Shark Photographed with Huge Mouth Open
a tiger shark with its mouth wide open
December 17th, 2013
A researcher snapped a close-up photo of a tiger shark with its massive mouth gaping open. The tiger sharks are often known as garbage disposals of the sea because of the variety of things they eat.
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'Shark's Eye' Videos Capture Predators' Mysterious Habits
Shark Sensors
February 27th, 2014
Sharks equipped with sophisticated sensors and cameras are helping researchers uncover new clues about their swimming and eating habits. The novel, "shark's eye" views are illuminating some of the least-understood behaviors of these shadowy predators.
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One-Quarter of Sharks and Rays at Risk of Extinction
Guitarfish
January 21st, 2014
A quarter of the world's sharks and rays are at risk of extinction, according to a new assessment by the International Union for Conservation of Nature (IUCN).
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Great White Sharks Live As Long As Humans
white shark
January 8th, 2014
Great white sharks may live much longer than previously thought, and also take longer to reach maturity, new research suggests.
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