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Amphibians (class Amphibia), such as frogs, toads, salamanders, newts and gymnophiona, are cold-blooded animals that change from a juvenile, water-breathing form to an adult, air-breathing form. Typically, amphibians have four limbs. Unlike other land animals (amniotes), amphibians lay eggs in water, as their fish ancestors did. Amphibians are superficially similar to reptiles.
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