Sharks

Shark Myths

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by: Jennifer Viegas
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Shark Enemies
DCI | Martin Ruegner/Getty Images

Wrong! "Killer whales occasionally take sharks," Gruber said. Parasites are responsible for numerous shark deaths each year. Even sharks eat other sharks. Bull and tiger sharks particularly are known for this, and may kill their own pups, somewhat similar to how male cats can kill kittens. "Humans are by far the greatest enemy of sharks, though," he said. A 2006 study in the journal Ecology Letters determined humans kill 73 million sharks a year. That is just as a result of the shark-finning trade alone. Researchers calculated that 1.7 tons of shark meat are harvested each year.

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