Crocodiles are among the world's most impressive, deadly predators. They are masters of camouflage, waiting patiently for unsuspecting prey to approach before lunging at high speeds. They have thick, rigid skin and dozens of sharp teeth inside jaws that deliver some of the biggest bite forces of any living animal. Other than humans, adult crocs have no natural predators.
They've existed for millions of years, now inhabiting five of Earth's seven continents.
But how much do you know about crocodiles? Take our quiz to find out.