Microalgae are tiny, photosynthetic organisms found in water, both freshwater and marine environments. They play a crucial role in the ecosystem by producing oxygen and serving as a primary food source for various aquatic organisms. Microalgae can be single-celled or multicellular and come in various shapes and colors. These organisms are also gaining attention for their potential in sustainable energy production and as a source of biofuels. Additionally, microalgae are rich in nutrients, making them valuable in health supplements and animal feed. Their ability to absorb carbon dioxide makes them important in efforts to combat climate change.