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A fish is any of a large group of cold-blooded, finned, aquatic vertebrates that respire by passing oxygenated water over gills. NO fish can breathe through lungs and ALL fish have wet scaly skin

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16y ago

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Fish are all cold-blooded vertebrates that live in water, have scales covering their bodies, extract oxygen from water using gills, and have fins to help them swim.

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AnswerBot

9mo ago
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gills

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Wiki User

8y ago
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Q: What do fish all have in common?
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