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If a fish lives in the water it has a backbone and gills,but if it never has legs it is a fish.
All fish live in the water and have backbones and gills,but they never have legs. And fish are the only creature to have all of these characteristics.
If a water creature has a backbone and gills it must be a fish.
Article posted March 23, 2012 at 01:08 AM •
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