What are some types of edible seaweed?

A popular type of edible seaweed is nori. This Asian seaweed is often seen wrapped around rice in sushi.

Nori is also known as purple laver and is cultivated primarily in Japan, though it is also found in China, the Republic of Korea and other intertidal zones around the world. Aonori is another one that is mainly cultivated in Japan. It contains high calcium, protein and iron, as well as low fat and sodium. Kombu is very popular in Japan. This dried seaweed contains a large amount of iron and protein.