CyanobacteriaAquatic bacteria meaning that they live underwater and they are photosynthetic; reflect certain wavelengths of visible light. They can create their own food, unicellular but do grow in large group that can be visible to the human eye. Because of them being photosynthetic and aquatic, they are commonly called "blue-green algae"
Interesting Fact: Known to be the oldest known fossil being more than 3.5 billion years old and are still around today. |