Rhodoliths: Our “Rock-and-Rolling” Underwater Friends

If you walk on the beach, you may observe many kinds of stones of diverse colors. Surprisingly, some of these “stones” may be algae! A certain type of red algae creates structures called redstones, also known as rhodoliths. Rhodoliths are important builders and can create extensive banks at the bottom of the oceans. These bioengineers create an oasis for marine life. Marine worms, crabs, and sea stars, for example, can live in and on rhodoliths. However, human activities, including pollution and removal of rhodoliths for aquarium decoration, may harm rhodolith banks. Rhodoliths are sensitive to disturbances and should be protected. In this article, we explain the main attributes of rhodoliths, including their formation, distribution, and importance, as well as conservation measures, we can take. We hope that what you learn about rhodoliths will inspire you to defend these fascinating “rock-and-rolling” ocean creatures.