Goniocidaris hystrix

from The Collaborative International Dictionary of English v.0.48
Piper \Pip"er\, n.
   1. (Mus.) One who plays on a pipe, or the like, esp. on a
      bagpipe. "The hereditary piper and his sons." --Macaulay.
      [1913 Webster]

   2. (Zool.)
      (a) A common European gurnard ({Trigla lyra}), having a
          large head, with prominent nasal projection, and with
          large, sharp, opercular spines.
      (b) A sea urchin ({Goniocidaris hystrix}) having very long
          spines, native of both the American and European
          coasts.
          [1913 Webster]

   {To pay the piper}, to bear the cost, expense, or trouble.
      [1913 Webster]
    

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