Cyanophyceae’ is a taxonomic group of photosynthetic microorganisms commonly known as blue-green algae. They are not true algae but are classified as a type of bacteria, specifically cyanobacteria. Cyanophyceae are characterized by their ability to perform oxygenic photosynthesis, using sunlight to convert carbon dioxide and water into glucose and oxygen. They are often found in aquatic environments, and some species can form blooms that impact water quality. Cyanophyceae play a significant role in ecosystems as primary producers and are known for their diverse metabolic capabilities.