#genus_Balaenoptera__Balaenoptera  type genus of the Balaenopteridae
  supertype:  #mammal_genus  a genus of mammals
  member of:  #family_Balaenopteridae
  member:  #blue_whale__sulfur_bottom__Balaenoptera_musculus  largest mammal ever known; bluish-gray migratory whalebone whale mostly of southern hemisphere
  member:  #finback_whale__finbackwhale__finback__finwhale__common_rorqual__Balaenoptera_physalus  large flat-headed whalebone whale having deep furrows along the throat; of Atlantic and Pacific
  member:  #sei_whale__seiwhale__Balaenoptera_borealis  similar to but smaller than the finback whale
  member:  #lesser_rorqual__piked_whale__pikedwhale__minke_whale__minkewhale__Balaenoptera_acutorostrata  small finback of coastal waters of Atlantic and Pacific

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