Cladophora Marimo 10Ø in a 20cm bottle. Marim balls, Marim moth. It is indeed a rare species of algae that is found naturally in the lakes and rivers of Iceland and Japan. There is a long-lived, slow (3-5 mm per year growing) ball of flies. Propagate by division. It can also be grown in tap water, preferably filtered. Protect from direct sunlight.
It is extremely popular in Japan and has a special place in their cuisine. It is a symbol of friendship and fellowship and is loved as a gift.