Sourced from Lake Akan, Marimo moss balls are considered to be a national treasure. A lot of effort has gone into protecting these balls of algae and their habitat. These mysterious moss balls inspire a deep fascination, and for this reason our Marimo shop provides you with plant aquariums with your very own moss ball pets! We offer both nano and junior moss balls, the former of which comes up to a half inch, while the latter can be one to two inches.