algae, alga is an informal term for any organisms of a large and diverse group of photosynthetic eukaryotes,

alga algae aquarium aquatic art branch brown called carried cell charophyta chlorella clades complex contrast coral diatoms distinct diverse division eukaryotes fish flower forms found freshwater giant green group grow include includes informal invertebrate kelp land large largest leaf macroalgae marine may metres microalgae multicellular multiple organism organisms passively pattern phloem photosynthetic phytoplankton plankton plant plants prototheca range reef seaweeds species spirogyra stomata stoneworts term tissue tree types underwater unicellular water xylem