Hippophae rhamnoides
The seaweed used in sushi-wrapping is called "nori." For more information on nori, click on the View Discussion button.
Nori, the dark green wrap that holds the sushi together in a roll, is made of seaweed. Seaweed is a type of algae.
They roll sushi in many things. The most common thing used is seaweed and crabmeat. That would be your center, then rice and depending on the type of sushi different seasonings go on top. The California roll for example has sesame seeds on top of the rice. Any kind of fish can potentially become sushi.
Seaweed, Rice and raw fish.
Nori is one kind of edible seaweed used in Japanese cookery.
Sushi is normally wrapped in nori, a green seaweed. There are items sold in some sushi places that are wrapped in a translucent material. This is rice paper and is edible, though it is not traditionally used in sushi.
Nori is an edible seaweed used in the preparation of sushi or onigiri. The seaweed is essentially a wrapper for these dishes.
Nori (a.k.a. laver) is a paper like, edible, toasted seaweed used in most kinds of sushi. The nori is actually the part that holds the sushi together.
red algae
Not normally. It is usually wrapped in Nori, a dried processed seaweed.
Not all sushi is wrapped. The ones that are (eg. ,makimono or gunkan-maki) are wrapped in seaweed. Modern interpretations may use beancurd skin, crepes, seaweed flakes, sesame seeds and other ingredients. Certain types of sushi eg. temarizushi or nigirizushi don't require wraps at all.
Sushi, particularly varieties that include seaweed and certain types of fish, can be high in iodine. Seaweed, such as nori used in sushi rolls, is one of the richest dietary sources of iodine. Fish like cod, tuna, and shrimp also contribute to iodine intake. Consuming sushi in moderation can be beneficial, but those with iodine sensitivities should be cautious.