What is Algae?
“Algae” is a broad term referring to a diverse group of aquatic organisms that contain chlorophyll and produce energy through photosynthesis. Unlike plants, algae do not have stems, flowers, or vascular tissues. However, some algae look like plants–seaweed is a type of multicellular algae that can grow in huge forests, while species in the genus Chara resemble small freshwater plants. Other types of algae grow in mats (filamentous algae) while the smallest species don’t have a solid form but instead just turn the water column green (planktonic algae). Though many species are harmless, there are some that contain toxins that can be deadly, so it is important to keep algae under control.