#family_Petromyzontidae__Petromyzontidae  lampreys
  supertype:  fish_family  any of various families of fish
  member of:  order_Cyclostomata
  member:  lamprey_eel__lampreyeel__lamprey__lamper_eel  primitive eellike freshwater or anadromous cyclostome having round sucking mouth with a rasping tongue
  member:  genus_Petromyzon__Petromyzon  typical lampreys
     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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