What animals at the moment of danger can make claws from subcutaneous bones? Detailed answer

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What animals at the moment of danger can make claws from subcutaneous bones? Detailed answer

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What animals at the moment of danger can make claws from subcutaneous bones?

The African frog Trichobatrachus robustus has a unique defense mechanism. At the moment of danger, her subcutaneous bones on her paws pierce the skin and protrude outward like cat claws. How the reverse "retraction" occurs is still unknown - presumably, the torn tissue regenerates, and the bones grow together again.

Authors: Jimmy Wales, Larry Sanger

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