A Moss Ball, also known as Marimo, is a spherical green algae that grows in freshwater lakes. It is composed of a type of green algae called Aegagropila linnaei, which forms into a ball shape due to water currents. Moss Balls are popular in aquariums and as decorative houseplants because they are easy to care for and can thrive in low light conditions. These unique organisms can live for many years and can even grow to be several inches in diameter. Moss Balls are often associated with good luck and are believed to bring positive energy to their surroundings. They require minimal maintenance, needing only occasional water changes and gentle cleaning.