#brown_algae__brownalgae  algae having the chlorophyll masked by brown and yellow pigments
  supertype:  #alga__algae  primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves
  member of:  #class_Phaeophyceae
  subtype:  #kelp  large brown seaweeds having fluted leathery fronds
     subtype:  #sea_tangle__seatangle__tang  any of various kelps especially of the genus Laminaria
  subtype:  #fucoid_algae__fucoid  any of various algae of the family Fucaceae
  subtype:  #rockweed  coarse brown seaweed growing on rocks exposed at low tide
     subtype:  #fucus__fucu  any member of the genus Fucus
     subtype:  #black_rockweed__blackrockweed__bladderwrack__bladder_fucus__bladderfucu__tang__Fucus_vesiculosus  common black rockweed used in preparing kelp and as manure
     subtype:  #bladderwrack__Ascophyllum_nodosum  similar to and found with black rockweed
  subtype:  #serrated_wrack__Fucus_serratus__tang  brown algae seaweed with serrated edges
  subtype:  #gulfweed__sargassum__sargasso__Sargassum_bacciferum  brown algae with rounded bladders forming dense floating masses in tropical Atlantic waters as in the Sargasso Sea

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