• Question: is your animal an invertibrae

    Asked by tclover to Naval Shipworm on 20 Nov 2017.
    • Photo: Naval Shipworm

      Naval Shipworm answered on 20 Nov 2017:

      Yes, definitely! Shipworms are molluscs, like clams or mussels. They do have shells, which shipworms use to burrow, but they don’t have any bones! Cuttlefish do have a “cuttlefish bone”, which you may have seen in bird cages – but this is a modified shell too.