Friday, November 5, 2010

Sharks cannot swim backwards.

In fact, most sharks can't even stay still. They need to be moving forward in order to force water through their mouths and over their gills. Otherwise they'll suffocate!

Some sharks can reach speeds of 20 mph, and can leap 20 feet above the water! While they can move really fast, they can't stop very quickly, or go in reverse.

There's more shark facts in this article from

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