25 Facts About Fish

1. Fish are vertebrate animals that live in the water. Vertebrate means they have a spinal cord surrounded by bone or cartilage.

2. Fish have gills that extract oxygen from the water around them.

3. There are over 30000 known species of fish.

4. Some flatfish use camouflage to hide themselves on the ocean floor.

5. Tuna can swim at speeds of up to 70 kph (43 mph).

6. Relative to their body size, fish have small brains compared to most other animals.

7. Fish are covered in scales which are often covered in a layer of slime to help their movement through water.

8. Cleaner fish help out other fish by removing parasites and dead skin from their scales.

9. Although jellyfish and crayfish have the word ‘fish’ in their name, they aren’t actually fish.

10. Over 1000 fish species are threatened by extinction.

11.Mermaids are mythological creatures with the tail of a fish and the upper half of a woman.

12. Fish have excellent senses of sight, touch, taste and many possess a good sense of smell and ‘hearing’.

13. Fish are cold-blooded like reptiles and amphibians. They can’t control their body temperature.

14.  The largest fish is the great whale shark which can reach fifty feet in length.

15. The smallest fish is the Philippine goby that is less than 1/3 of an inch when fully grown.

16. Fish have a good sense of taste, sight and touch. They can feel pain.

17. Some species of fish can fly (glide) others can skip along the surface and others can even climb rock.

18.  Salmon migrate every year to breed and lay eggs. 

19.  40% of all fish species inhabit fresh water, yet less than .01% of the earth’s water is fresh water. Tropical fish are one of the most popular pets in the U.S.

20. 95% of tropical fish mortality results from improper housing and nutrition.

21. Fish have a specialized sense organ called the lateral line which works much like radar and helps them navigate in dark or murky water.

22.  Fish eat other fish, fish eggs, mollusks, aquatic plants, algae, zooplankton, terrestrial insects, water birds, turtles, frogs, snakes and mice

23. It is estimated that there may still be over 15,000 fish species that have not yet been identified.

24. Fish have been on the earth for more than 450 million years.

25. A person who studies fish called an ichthyologist.


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