CATDOLL : CATDOLL: What is seaweed made of?

Nori is made from fresh laver, such as porphyra tan, porphyra yezoensis, porphyra gansu, laver half-leaf, laver wrinkled, and laver long, which is washed and dried. The fresh laver that has not been washed is very salty. Most of the laver is naturally air-dried, and it can be dried in one or two days if the sun is good. Dried laver is rich in crude protein, dietary fiber, multiple vitamins, and trace elements such as calcium, potassium, and magnesium, and is a rare marine food.

Porphyra is a general term for the mutualistic algae in the sea. Porphyra thallus mostly grows in the intertidal zone, preferring sea areas with strong winds and waves, smooth tides, and rich nutrients and salt. It has strong drought tolerance; the suitable light intensity is 5000-6000 lux, with the characteristics of high light saturation point and low light compensation point, and is a high-yield crop.

Porphyra is often mistaken and considered a plant because it can photosynthesize; however, biologists generally believe that it is not a true plant because it does not have true vascular tissue (xylem and phloem), unlike aquatic plants. In addition, several bacteria are related to nori. Large nori grows mostly in cold regions, and artificially cultivated species include Porphyra yezoensis and Porphyra haitanensis.

High-quality laver does not fade. If the color of the water turns darker and purple during soaking, it may be dyed with other seaweed. And good laver smells unique and slightly marine, while inferior and aged laver has a strong marine or strange smell.