• What has up to 3,000 teeth?
  Hunting sharks have triangular teeth with serrated (jagged) edges ...

• Are all sharks deadly?
  No. Scientists have identified about 380 different kinds of shark. ...

• What would sink if it didn’t swim?
  Most fish have a special organ, called a swim bladder, that helps ...

• How do fish hide in dark seas?
  Deep-sea fish are camouflaged to blend in with their surroundings. ...

• What record-breaking fish came back to life?
  Coelacanths are giant primitive fish that scientists knew from ...

• How do deep-sea creatures find their food in the dark?
  In the black depths, many deep-sea fish sense their prey by smell, ...

• What is the biggest fish?
  Fish vary more in size than any other group of animals with backbones ...

• Can deep-sea fish see in the dark?
  For many deep-sea fish, vision is little use in the inky darkness. ...

• What are the tiniest sea creatures?
  Thousands of kinds of tiny creatures live in the world's oceans. The ...

• How do deep-sea creatures light up the dark?
  As many as 1,000 different fish make light in the deep oceans. Some ...