The marimo (Aegagropila brownii), a nationally designated Special Natural Monument of Japan, inhabits Lake Akan in Hokkaido, where environmental conditions fluctuate drastically with the seasons. Of ...

Climate change could overexpose rare underwater "marimo" algae balls to sunlight, killing them off, according to a new study at the University of Tokyo. Marimo are living fluffy balls of green algae.

Marimo - or seaweed balls - could be at risk of extinction due to global warming, a new study has found. The living algae balls are sheltered from excessive winter sunlight by a thick layer of ice and ...

Marimo are a unique growth form of lake algae and used to be found in cold lakes in Japan and Northern Europe. However, the only place where specimens larger than 20 cm in diameter can now be found is ...