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An African clawed frog lies sprawled with one hindlimb that regrew after amputation as a single tapering cartilage spike instead of a webbed foot. The other legs keep their long clawed toes and full webbing, so the contrast between the normal limb and the spike is easy to see. Smooth skin, a flattened body and the frog's upturned head read clearly. Use it to show regeneration and bioelectricity research in a biology class, pair it with a regrown-limb model for comparison, or keep it as a talking piece on a science shelf.

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