The document lists several dangerous shark species including the great white shark, tiger shark, hammerhead shark, mako shark, and bull shark. It then provides some facts about sharks such as their ability to detect blood from far away, hear fish thrashing from 500 meters, have a wide field of vision spanning almost 360 degrees, and gestation periods that can range from 5 months to 2 years for pregnant females. It concludes with notes about whale sharks being the largest sharks and dwarf lantern sharks being the smallest, as well as statistics about fishermen killing an estimated 30 to 100 million sharks per year with around 75 species in danger of extinction.