" Lacy little green fronds waved up through clear liquid; it reminded me of a forest stream in early spring, just after the ice has melted. I picked up a frond, and as I put it in my mouth, I experienced a moment of cool, pure freshness. "What is it?" I asked Jake, enchanted. "Mozuku, a special kind of seaweed from Okinawa. You don't think it's slimy?" "Slippery, but I love the way it feels in my mouth. "