Oliver Knott on Instagram: "The largest Marimos in the world live here 💚🌏 Thanks to @kushiro_marimolab In the crystal-clear waters of Lake Akan in Hokkaido, Japan, live rare green wonders called Marimo—algae that roll themselves into perfect velvety balls. The biggest can grow over 30 cm wide and live for decades! Marimo roll around with the lake’s gentle waves, keeping their shape (like a slow-motion tumbleweed). They’re so loved in Japan they have their own festival every October. 🎉 Legend