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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Rare, Tiny 'Pocket Shark' Seen for 2nd Time
A pocket shark found in the Gulf of Mexico
April 24th, 2015
A juvenile male pocket shark has been identified from the Gulf of Mexico offshore Louisiana. The tiny shark has an orifice above its fin that may secrete either mate-attracting pheromones or a luminous substance.
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Watch Very '80s Footage of 'Shark Lady' Eugenie Clark at Work
Eugenie Clark in Pisces VI
February 27th, 2015
This week, ocean explorers mourned the loss of a legend in their field: Eugenie Clark, a marine biologist and authority on sharks.
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Birth of Jaws: Tiny Fish May Be Ancient Ancestor
fish fossil comparison
January 12th, 2015
The remains of a 415-million-year-old fish skull from Siberia — though miniscule in size — offer hints about the origins of all jawed vertebrates, ranging from reptiles to humans, a new study finds.
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In Photos: Rare Pocket Shark Discovered
Illustration of a pocket shark.
April 24th, 2015
Scientists have identified a pocket shark that was collected from the Gulf of Mexico, only the second specimen in this genus ever reported, they say. Here are images of the teensy shark.
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Great White Sharks Are Late Bloomers
A great white shark cruises underwater in search of prey.
February 19th, 2015
Great white sharks may have an even more delayed adolescence than humans, not reaching sexual maturity until they are in their second and third decades, new research shows.
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In Photos: Ancient Fish Skull From Siberia
Fish fossil skull size
January 12th, 2015
When researchers first looked at a tiny fish skull from 415 million years ago, they classified it as a bony fish. But a new, high-tech look at the fossil shows that it's much more.
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Solved: When Earth's Largest Shark Disappeared
Megalodon Fighting Titanoboa
October 22nd, 2014
A new study of fossil records estimates that the 60-foot-long (18 meters) Megalodon shark went extinct 2.6 million years ago.
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Hiding Out of Sight, Are Sharks Self Aware? (Op-Ed)
Sick sharks get meds
March 4th, 2015
Slipping in and out of view, what are sharks thinking?
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Freaky Shark 'Out of a Horror Movie' Caught by Fisherman
Frilled shark
January 22nd, 2015
A bizarre, freaky-looking shark with rows of needle-sharp teeth and a body like an eel's was caught by a fisherman in Australia. The odd creature is a rare type of shark known as a frilled shark, and is sometimes called a fish "fossil" because it dates ba
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