Fish

1. Fish are cold-blooded vertebrates that live in water and respire through gills.
2. There are over 32,000 known species of fish, making them the most diverse group of vertebrates.
3. The largest fish is the whale shark, while the smallest is the stout Floater.
4. Some fish, like the mudskipper, can breathe air and live both in water and on land.
5. Fish have scales, which serve as a protective covering for their bodies.
6. Many fish exhibit schooling behavior for protection and improved foraging.
7. The electric eel can generate electric shocks to navigate and locate prey.
8. Some fish, such as the clownfish, can change their sex during their lifetime.
9. Fish play crucial roles in ecosystems by controlling populations of other organisms.
10. Overfishing, pollution, and habitat destruction pose significant threats to fish populations worldwide.