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.