Shark Facts



  • Sharks are the most fearsome predatory fish of the seas. There are 375 species, living mostly in warm seas.
  • Sharks have a skeleton made of rubbery cartilage – most other kinds of fish have bony skeletons.
  • The world’s biggest fish is the whale shark, which can grow to well over 12 m long. Unlike other sharks, the whale shark and the basking shark (at 9 m long) mostly eat plankton and are completely harmless.
  • A shark’s main weapons are its teeth – they are powerful enough to bite through plate steel.
  • A shark’s torpedo-shaped body makes it a very fast swimmer.
  • Sharks put so much strain on their teeth that they always have three or four spare rows of teeth in reserve.
  • Nurse sharks grow a new set of teeth every 8 days.
  • Up to 20 people die from recorded shark attacks each year.
  • The killing machine of the shark world is the great white shark, responsible for most attacks on humans.
  • Hammerhead sharks can also be dangerous. They have T-shaped heads, with eyes and nostrils at the end of the T.
  • The super-streamlined blue shark lives in warm seas and is 3.7 m in length. It has very long side fins and eats surface fish like herring and mackerel.