#marine algae

• Aerocyst — An anatomical structure in the shape of a bladder, pouch, or sac filled with air, found in the stem or leaf structure of certain aquatic plants and marine algae (such as those of the genus Fucus). This floating vesicle functions as a natural hydrostatic organ, keeping the plant at the water surface to capture a maximum amount of sunlight required for photosynthesis.
• Algotrophic — Feeding on algae or depending nutritionally on algal biomass; algophagous. In aquatic ecology, the term characterizes secondary consumer organisms or trophic webs within a biotope where primary production is overwhelmingly provided by microscopic or macroscopic algae.