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Sharks

5 Interesting Facts

• Their "Ears" Are Located Inside Their Head
  

  Contrary to popular belief, sharks do have ears, although they aren’t visible like most species.

• Not All Sharks Swim
  

  Bamboo sharks don’t swim. They use four different fins to walk across the ocean floor.

• Large sharks live longer than smaller sharks
  

  Because they’re higher in the food chain, large sharks are less likely to be eaten than smaller sharks.

• Sharks can go into a trance
  
  When you flip a shark upside down they go into a trance-like state called tonic immobility.
  This is how scientists study them in the water without risk of danger.

• 30% of sharks are close to extinction
  

  Hammerheads were the first species of shark on the endangered species list but blue sharks, highly coveted for their fins used in shark fin soup, are classified as Near Threatened.

Humans are responsible for drastic declines in shark populations. A drop in numbers is bad news for sharks but also for ocean health in general: As top predators of the ocean, sharks are critical for ensuring a balanced food web.
Learn More on WWF