Few divers encountered Sharks.

Hammerhead sharks are large and powerful animals that strike fear in the hearts of many. They are formidable hunters with rows of razor sharp teeth. Sleek and graceful in the water, they are beautiful and deadly at the same time. Yet, astonishingly, there have been only 17 unprovoked attacks on humans by hammers in the past 500 years. Not a single encounter was fatal. But it cannot be denied that people view these sharks as vicious, bloodthirsty animals.
Myths about these animals and their aggression are persistent and widely spread.
And some divers faced sharks which was very tough.