#alga__algae  primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves
  supertype:  protoctist  any of the unicellular protists
  subtype:  seaweed  plant growing in the sea, especially marine algae
     subtype:  arame  an edilbe seaweed with a mild flavor
     subtype:  wrack  dried seaweed especially that cast ashore
     subtype:  seagrass  any of various seaweeds that grow underwater in shallow beds
     subtype:  sea_wrack__seawrack__wrack  growth of marine vegetation especially of the large forms such as rockweeds and kelp
     subtype:  sea_tang__seatang__tang  any of various coarse seaweeds
  subtype:  golden_algae  algae having the pigments chlorophyll and carotene and xanthophyll
  subtype:  yellow-green_algae  any alga of the division Chrysophyta with its chlorophyll masked by yellow pigment
     subtype:  conferva  any of various algae of the genus Tribonema; algae with branching filaments that form scum in still or stagnant fresh water
  subtype:  diatom  microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica
  subtype:  confervoid_algae  algae resembling confervae especially in having branching filaments
  subtype:  brown_algae__brownalgae  algae having the chlorophyll masked by brown and yellow pigments
     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
  subtype:  euglenoid__euglenophyte__euglenid  marine and freshwater green or colorless flagellate organism
  subtype:  green_algae__greenalgae__chlorophyte  algae that are clear green in color; often growing on wet ricks or damp wood or the surface of stagnant water
     subtype:  sea_lettuce__sealettuce__laver  seaweed with edible translucent crinkly green fronds
     subtype:  pond_scum  free-floating freshwater green algae
     subtype:  spirogyra  freshwater algae consisting of minute filaments containing spiral chlorophyll bands
     subtype:  stonewort  any of various submerged aquatic algae of the genus Chara having nodes with whorled filamentlike branches; usually encrusted with calcium carbonate deposits
     subtype:  desmid  freshwater green algae
  subtype:  chlorella  any alga of the genus Chlorella
  subtype:  red_algae__redalgae  marine algae in which the chlorophyll is masked by a red or purplish pigment; source of agar and carrageenan
     subtype:  sea_moss  any of various red algae having graceful rose to purple fronds (e.g. dulse or carrageen)
     subtype:  Irish_moss__carrageen__carageen__carragheen__Chondrus_crispus  dark purple edible seaweed of the Atlantic coasts of Europe and North America
     subtype:  dulse__Rhodymenia_palmata  coarse edible red seaweed
     subtype:  red_laver__redlaver__laver  edible red seaweeds
  subtype:  cryptomonad__cryptophyte  common in fresh and salt water appearing along the shore as algal blooms

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