Aonori is a type of seaweed. I used to think that when sheet type nori is crushed, it becomes confetti like green aonori flakes. But two seaweed actually belong to two different family.
It adds faint ocean smell to food and and also rich in minerals. The only, but big downside is that it tends to stick to the teeth. I just can’t talk or smile confidently after eating food with aonori.
Aonori is sold at Japanese grocery stores. I am not certain Chinese or Korean stores carry it.