#ray.spine  any of the stiff bony rods in the fin of a fish
  supertype:  #spine  a sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin
  part of:  #fin  organ of locomotion and balance in fishes and some other aquatic animals
     part of:  #fish  any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills

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