Cladophora Marimo, commonly known as marimo moss balls, are unique green algae formations that resemble fluffy, round balls. They are a form of cladophora and thrive in freshwater environments, particularly in cold lakes. Marimo can be found naturally in places like Lake Akan in Japan and are often kept as decorative items in aquariums and home décor. They are appreciated not only for their aesthetic appeal but also for their ability to improve water quality by absorbing nutrients. Marimo moss balls require low to moderate light and can be easily maintained with regular water changes, making them a popular choice for both novice and seasoned plant enthusiasts.