Content Source : Wikipedia
Sharks have roamed the oceans for over 400 million years, outdating dinosaurs.
With over 500 species, sharks range from the enormous whale shark to the tiny dwarf lanternshark.
Sharks' skeletons are made of cartilage, not bone.
Sharks can detect the electrical fields of other animals.
Some sharks, like the lanternshark, can glow in the dark.
Sharks have rows of teeth, with new ones constantly replacing lost ones.
As apex predators, sharks play a crucial role in marine ecosystems.
Sharks can enter a trance-like state when flipped upside down.
Sharks have impressive wound-healing and immune systems.
Despite their reputation, sharks are responsible for very few deaths annually.