Fish - Cold blooded, gills, scales, lays eggs in water, Mammals - Warm blooded, lungs, hair, live birth and feed milk to young, Amphibians - Cold blooded, gills and lungs, thin moist skin, jelly eggs in water, Reptiles  - Cold blooded, lungs, scales, lay eggs on land, Birds - Warm blooded, lungs, feathers, lay hard eggs,

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