Which seaweed species is mainly used to wrap sushi?

Question

I would like to know the exact scientific name of the seaweed used.

Answer 1

While there are many different varieties of seaweeds used for consumption, Nori is by far the most commonly known and used seaweed on the market.  Nori, in more technical terms, is red algae from the Porphyra genus.

See: http://sushinow.com/nori.htm