Eating <em>Porphyra</em> (IMAGE) Carnegie Institution for Science Caption Porphyra is a food source in many cultures. It is called "nori" in Japan, where it is used to wrap sushi, and "laver" in Wales, where it is a traditional food ingredient. Credit Images public domain. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.