Flexi Says: Few animals including starfish, lizards, and salamanders can regenerate arms, legs, and tails. Who else in the animal kingdom can regenerate? A starfish will regrow a new arm, but even more impressively, an arm can generate an entire new starfish! The Mexican axolotl can regain the use of paralyzed limbs. A deer can regrow 60 lb (27 kg) of antlers in three months. Sharks regenerate teeth and can grow 24,000 in a lifetime. Humans are not so lucky. We can regenerate our skin to heal wounds, the lining of our gut, and to some degree our livers, but the majority of our organs have limited regenerative capacity.