#genus_Petromyzon__Petromyzon  typical lampreys
  supertype:  #fish_genus  any of various genus of fish
  member of:  #family_Petromyzontidae
  member:  #sea_lamprey__sealamprey__Petromyzon_marinus  large anadromous lamprey sometimes used as food; destructive of native fish fauna in the Great Lakes

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