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A sea-snake lives it's entire life in the ocean, but it's not a fish! Certain physical attributes allow mankind to sort and classify animals into families or groups. Despite a crocadilian spending a portion of it's life in water it still has the reproductive elements, skeletal structure, scales, ectothermic (cold-blooded) system, etc. that classify it as a reptile. Think about the variety of animals that make up mammals, i.e., elephants, mice, seals, bats, monkeys, dolphins...humans, etc., etc., etc. we share certain physical attributes with those animals that make us all mammals (milk glands, hair (sometimes), endothermic (warm-blooded) system, etc.). Then ya get the fun animals like the Platypus that has hair, warmblood, milk glands (i.e. mammal), but lays eggs!!!...it's all fun stuff. The bottom line is only mankind worries about putting things in neat catagorical boxes...the animals don't care, they know what they are!!! [img]modules/Forum/images/smiles/icon_biggrin.gif[/img]
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