Do moss balls float when they're happy?
Christopher Davis
Updated on April 23, 2026
However, when
Marimos
Marimo balls grow slowly: up to 5 mm per year, eventually reaching 2 to 5 inches in aquariums, or 8 to 12 inches in natural conditions. Wild marimos live in cold, dark waters where the waves slowly turn them to expose all sides to the light. Indoors they need to be kept in clean, cold water with low lighting.
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› news › marimo-mossballpet-basicsMoss Ball Pets
A hairy green alien hamster? In reality Marimo “moss balls” (Aegagropila linnaei) are a type of green algae that naturally grows into a spherical shape. They are native to Japan and Northern Europe where they grow in cold freshwater lakes.
https://mossballpets.com
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