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Fish Facts

A water-borne cold-blooded organism

  • Fish have been on the earth for more than 450 million years.
  • There are over 25,000 identified species of fish on the earth.
  • 40% of all fish species inhabit fresh water, yet less than .01% of the earth's water is fresh water.
  • Fishes were the first animals to evolve backbones.
  • Fish breathes inside water.
  • Most fishes eat thier ownkind.
  • Fish have a specialized sense organ called the lateral line which works much like radar and helps them navigate in dark or murky water.
  • The tiniest fish is the stout infant at a quarter of an inch
  • A group of fish is referred to as a 'school'.
  • The ray-finned fishes are the largest group of fish.
  • Fishes are cold-blooded (ectothermic) animals.
  • There are two groups of jawless fishes alive today.
  • Many species of cichlids brood their eggs in their mouth.
  • Some fish can swim backwards.
  • The Oscar fish change colors when they begin mating.
  • A jellyfish has no brain. It neither posess blood nor a nervous system.
  • Sharks are able to see almost as well behind as they can see in front.
  • Fish feel pain and suffer stress just like mammals and birds.
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