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Fish

Fish are an incredibly diverse group of animals. Read these articles to find out about all kinds of unique and different fish.

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Why do people collect shark teeth?

Sharks can have up to 15 rows of teeth growing behind their front row of chompers, so it's no surprise how many shark teeth litter beaches. But why do people collect them?

How do sharks see, smell and hear?

You don't reign supreme over the marine food chain without acute senses that can smell blood or hear injured prey from great distances. And sometimes a "sixth sense" doesn't hurt either.

How Tiger Sharks Work

Have you ever been so hungry that you could eat anything? How about a hubcap? Or maybe a suit of armor? If you said "yes," you might have something in common with the second deadliest shark.

Shark Pictures

Sharks are an intelligent and sometimes dangerous species of saltwater fish. Learn more about these often feared, often misunderstood creatures of the deep in this gallery.

How Sharks Work

The oldest shark fossils date from more than 300 million years ago, before the dinosaurs. A few species have kept the same physical characteristics for more than 150 million years. How have they survived so well?

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