united states marine corps: an amphibious division of the United States Navy
marines: members of a body of troops trained to serve on land or at sea
chlorophyta: large division of chiefly freshwater eukaryotic algae that possess chlorophyll a and b, store food as starch, and cellulose cell walls; classes Chlorophyceae, Ulvophyceae, and Charophyceae; obviously ancestral to land plants