2. Gracilaria lemaneiformis, also known as seaweed, can be eaten cold after simple treatment. Gracilaria lemaneiformis can be put in a pot and soaked in cold water for about 20 minutes, and it will be soaked after a little stirring. You can also soak your hair in hot water, the effect is the same, but it will shorten the time of soaking your hair. Finally, you can wash it with water and cool it.