• Question: how does it work without a brain

    Asked by em10 to Common starfish on 10 Nov 2017. This question was also asked by spaghettibolognese.
    • Photo: Common Starfish

      Common Starfish answered on 10 Nov 2017:

      common starfish don’t have a brain. But they have a nervous system, mainly including a circumoral nerve ring and five radial nerve cord. They also have hormones, and more than 40 neuropeptides have been identified in common starfish, which are involved in the behaviour of starfish.