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Yes, starfish can re-grow limbs, because starfish have totipotent cells, so their body can regenerate any cell that the body needs. Starfish can get their arms decapitated, or they can decapitate their limbs, like a lizard can with its tail, when a predator grabs them by a limb.- John Baskin
Information from http://blog.nus.edu.sg/lsm1303student2011/2011/04/04/can-starfish-really-grow-back-their-lost-limbs/