毬藻 マリモ
Marimo or [i]Aegagropila linnaei[/i] is a species of green [[algae]] known to form in rare cases into velvety-looking green balls. Said balls are known to only grow in a few places in the world, including Lake Akan in Japan and Lake Mývatn in Iceland.

h4.External links

* "Wikipedia article: Marimo":[https://en.wikipedia.org/wiki/Marimo]
marimo