Fish have adapted to live in the water

Chapter topics:

1. Fish have adapted to live in the water
2. There is a wide variety of fish in the world
3. What is the external structure of fish?
4. The skin of fish is covered in scales
5. A swim bladder helps maintain the right depth in the water
6. The colour of a fish is related to their habitat
7. The body type of a fish often reflects their way of life
8. Test or research 
9. Cartilaginous fish
10. Jawless fish
11. Questions and tasks
12. Important terms

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