marimo

Marimo (毬藻?, literally "ball seaweed"), also known as Cladophora ball, Lake ball, or Moss Balls in English, is a species of filamentous green algae (Chlorophyta) found in a number of lakes in the northern hemisphere. A marimo is a rare growth form of the species where the algae grow into large green balls with a velvety appearance. Colonies of such balls are only known to form in Iceland, Scotland, Japan and Estonia.


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• http://en.wikipedia.org/wiki/Marimo (Wikipedia)