The Class Chlorophyceae is a group of green algae that belongs to the kingdom Plantae. The term Chlorophyceae comes from the Greek words "chloros" meaning green and "phykos" meaning seaweed. Chlorophyceae is also known as the green algae family, which is a well-known taxonomic classification for the algae that contain chloroplasts. Other synonyms for the term Chlorophyceae include Chlorophycophyta, Chlorophyta, green algae, and Chlorophytes. Chlorophyceae plays a significant role in the ecological balance of the aquatic ecosystem by producing oxygen gas that is vital for the survival of aquatic organisms. Their ability to undergo photosynthesis also makes them an important food source for herbivorous aquatic animals.