#genus_Thunnus__Thunnus  tunas: warm-blooded fishes
  supertype:  fish_genus  any of various genus of fish
  member of:  family_Scombridae
  member:  tuna__tunny  any very large marine food and game fish of the genus Thunnus; related to mackerel; chiefly of warm waters
  member:  horse_mackerel__horsemackerel__bluefin__bluefin_tuna__bluefintuna__Thunnus_thynnus  largest tuna; to 1500 pounds; of mostly temperate seas: feed in polar regions but breed in tropics
  member:  yellowfin_tuna__yellowfintuna__yellowfin__Thunnus_albacares  may reach 400 pounds; worldwide in tropics

No statement uses or specializes genus_Thunnus; click here to add one.