Kelp is a type of large, brown seaweed that grows in shallow, nutrient-rich saltwater near coastal areas. It is an example of an ALGA, which is a type of organism that includes both single-celled and multicellular species. Algae are found in a variety of habitats, including oceans, rivers, and even damp soil. They are important sources of food and oxygen for many aquatic organisms, and they also provide shelter and protection for other species.