#spiny_dogfish__spinydogfish  small bottom-dwelling dogfishes
  supertype:  dogfish  any of several small sharks
  member of:  family_Squalidae
  subtype:  Atlantic_spiny_dogfish__Squalus_acanthias  destructive dogfish of American and European Atlantic coastal waters; widely used in anatomy classes
  subtype:  Pacific_spiny_dogfish__Squalus_suckleyi  dogfish of Pacific coast of North America

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