10 facts about Fish
1. A fish is a cold-blooded aquatic animal that is covered with scales and usually has two paired and several unpaired fins.
2. Fishes inhabit rivers, seas, oceans and small water bodies with fresh water.
3. Fishes are very important as food for humankind and are obtained both through fishing and farming.
4. Fishes are also important as deities and religious symbols in some cultures.
5. Fish has a streamlined body, which is essential for rapid swimming.
6. Only some fish species such as tuna, swordfish, and some species of sharks are warm-blooded. Unlike all other fishes, these species are able to raise their body temperature to a considerable extent.
7. Many groups of freshwater fish are able to extract oxygen from both air and water through using different kinds of structures.
8. The stonefish which lives near the Australian coastline is the most poisonous fish in the world.
9. The lung fish has a capability to live out of water for almost four years!
10. Another interesting fact is that Dolphins sleep with one eye open!
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