For those that want a pet but don’t have the time for a dog, cat, or fish, we recommend a marimo! Marimo are a type of algae resembling an underwater moss ball that grow wild in some Japanese lakes. Marimo are very popular in Japan as pets, as they are low maintenance and super cute. In this article, we’ll take you through everything you need to know about marimo, including how to look after them and where to buy them!