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Marimo Moss Ball
Aegagropila linnaei
Family: Cladophoraceae
📍 Lake Akan (Japan), Lake Mývatn (Iceland)
Beloved velvety-green spheres of filamentous green algae — not a moss at all. Forms naturally in cold lakes where wave action rolls colonies into balls over decades. A low-maintenance aquarium icon that grows extremely slowly. Rotate occasionally for even light exposure.
Keeping this species
- role
- beneficial / decorative
- growth
- very slow
- maxSize
- 5 inches diameter
- lightLevel
- low to medium
- temperature
- 59–77°F (15–25°C)
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Temperature
59–77°F
15–25°C
Natural Habitat Temperature
39°F — 66°F seasonal range · (Jan low, Jul high)