Under the water, along the southern coastline of Australia, lies the Great Southern Reef—a reef that many people have never heard about. The water is colder than that of tropical reefs and instead of being built by corals, it is mainly formed by a specific type of brown seaweed known as kelp. Just like trees on land, kelp grow and cover large areas, forming underwater forests that are home for many kinds of fish, molluscs, crustaceans, and seaweed species.
