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          Different worm-like borers
         
         
      Besides the ships worm, there is another 
        group of worm-like bivalves that bore into wood. Unlike the genuine ships 
        worm, they do not line their tunnels, and they are found no deeper than 
        10 m. Of this group, only 2-4 specie are found in Scandinavia, and all 
        belong to the family Xylophaga(which means wood eater). Of the 
        genuine ship worms, only one of the Scandinavian specie is found in driftwood 
        and possibly some other species, as yet not known, along the Scandinavian 
        coasts can be found in driftwood from warmer waters. 
          
         Bo Johannesson
         
          
            
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