Large Algae is a term used to describe a group of large, multicellular organisms that are found in marine and freshwater environments. The most common type of large algae is KELP, which is a type of brown algae that grows in shallow, nutrient-rich coastal waters. KELP is an important part of the marine ecosystem, providing food and shelter for many species of fish and other marine life. It is also used in many industries, such as food production, pharmaceuticals, and cosmetics.