<p><br> This close-up of a great white shark's mouth shows its rows of sharp teeth. When a shark loses a tooth, a replacement moves forward to replace it.</p>

Great White Shark


This close-up of a great white shark's mouth shows its rows of sharp teeth. When a shark loses a tooth, a replacement moves forward to replace it.

Photograph by David Doubilet

Sharks

See shark pictures (including great white sharks, nurse sharks, tigers sharks, and more) in this photo gallery from National Geographic.

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