A type of bright green seaweed used to make soups and to colour various dishes. To cook, first soak a small piece in luke warm water for 10 minutes or so, The ribs can be discarded and the remaining fronds chopped. It should be added to to soups and stews towards the end of the cooking process to retain the flavour. It may also be baked dry and mixed with roasted sesame seeds to make a condiment.