All About Sharks

With fossil records dating back 400 million years, sharks have outlived the dinosaurs and many other forms of life currently on earth. There are more than 1,000 species of sharks and rays, with new species discovered every year.

These majestic top predators that are so essential to the natural order of marine ecosystems now face their most severe threat from overfishing. Many species are threatened with extinction, with some families of rays such as sawfishes in peril. While sharks and rays have been an irreplaceable resource for coastal communities in the developing world for centuries.

Look at the shark's teeth, with a new row ready to replace the missing teeth.

(WWF)