#family_Squalidae__Squalidae  dogfishes having a spine in each dorsal fin
  supertype:  #fish_family  any of various families of fish
  member of:  #subclass_Elasmobranchii
  member:  #spiny_dogfish__spinydogfish  small bottom-dwelling dogfishes
  member:  #genus_Squalus__Squalus  spiny dogfishes
     member:  #Atlantic_spiny_dogfish__Squalus_acanthias  destructive dogfish of American and European Atlantic coastal waters; widely used in anatomy classes
     member:  #Pacific_spiny_dogfish__Squalus_suckleyi  dogfish of Pacific coast of North America

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