Piranhas are best known for their razor-sharp interlocking teeth and their ability to strip an animal of its flesh within seconds.

However, their ferociousness has been exaggerated. It's actually safe to swim in the same water with piranhas as long as they're not hungry - but if their food supply has run scarce they will eat you.

If you plan to visit the Zoo, it might be fun to plan your trip around the piranha feeding.