Seaweed is a type of nori, also known as striped nori.

Seaweed is all nori, but nori is not all seaweed. Red algae phylum, family Rhodophyta. Algae body has purple or red, by a single layer or two layers of cells constitute a membrane, there are leaf-shaped, heart-shaped, banded and so on. Pseudoroot-like fixer in the lower part of the purslane is attached to the rock. The height can reach 20-30 centimeters. Dioecious, reproductive process is more complex, in 1955 our country's scientific workers for the first time to figure out the life history of purslane, by purslane, filamentous body, small purslane this three stages.

There are two kinds of seaweed sold on the market, one is to do sushi cooking with roasted seaweed (roasted seaweed), and the other is called "instant flavored seaweed", their raw materials are seaweed in the striped seaweed.

Growth habit of seaweed:

Seaweed is a collective name for a group of algae that live in the sea and are edible. Unlike most algae, nori is a multicellular organism visible to the naked eye. It usually lives on the seafloor tens of meters from the intertidal zone, and is usually green in color, occasionally red.

Purple is often mistaken for a plant because of its ability to photosynthesize; however, biologists generally agree that it is not a true plant because it does not have true plumbing tissue (xylem and phloem), unlike seagrass. In addition, there are several species of cyanobacteria associated with seagrass.

The following reference: Baidu Encyclopedia-Seaweed