Japanese Marimo has recently taken the world pet market by storm. It's petite appearance brings luck, love and happiness. It only needs to be kept in a glass bottle. It doesn't require feeding, make sure you change the water weekly, it grows with normal lighting in the room. It is alive, it swims, moves and can multiply babies across time. It is the best pet for today's modern lifestyle with convenient maintenance.
Marimo balls are considered a treasure in Japan and that's why it's featured on many items in Japan. The Marimo Moss Ball is so popular because it's simple to raise and keep in a pond or aquarium. You can keep these in little table aquariums all the way up to the biggest fish tank you can get. Their is no special way to care for the moss balls or a tank requirement. You don't need fertilizer which is great and any light will do for them unlike most plants that require special lighting requirements. The third thing that makes Marimo Moss Ball so interesting is the ability to float and sink freely..
Brief Characteristics : These round fuzzies are a type of algae with its' round shape formed by being pushed back and forth by the waves. It is a protected species and considered a National Treasure of Japan. It only grows 5mm a year or maybe even more if provided with the ideal environment, the biggest recorded in the wild is 30cm which would be around 60 years old or even more. I read somewhere that they can grow up to 100 years (http://www.marimoballs.com/). Marimo Balls can also be found in different parts of the world.