PHOTOS: Sharks Swim Towards Extinction

Study finds three shark species to be on the brink of extinction.

PHOTOS: Sharks Threatened by Fin Soup

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In addition to their fins, sharks are also targeted for their meat, liver oil and cartilage. Liver oil and cartilage is used in several cosmetics and dietary supplements. A black tip shark hunts. (Courtesy Rob Stewart/Sharkwater)
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