1. How do fish breathe underwater?

• by chewing algae and other plants
• through their gills
• by swimming really fast in the sunlight

2. Is it true that most fish sleep?

• no
• yes.

3. Why don't fish close their eyes when they sleep?

• like to see what's going on
• need to protect themselves from predators
• they don't have eyelids
• need to keep an eye on other fish

4. All fish

• breathe with their gills
• have a backbone
• catch a cold in cold water
• are cold blooded

5. There are about ________ different species of fish alive today.

• 50,000
• 1500
• 100
• 25,000

Last Updated: 3/24/09

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