1. There are over 25,000 identified species of fish on the earth.
2. It is estimated that there may still be over 15,000 fish species that have not yet been identified.
3. Some fish make sounds by grating their teeth and others like some catfish make sounds from their air filled swim bladder.
4. The largest fish is the great whale shark which can reach fifty feet in length.
5. The smallest fish is the Philippine goby that is less than 1/3 of an inch when fully grown.
6. Fish feel pain and suffer stress just like mammals and birds.
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