Undaria pinnatifida belongs to Phaeophyta, Phaeophyta, laminariales, Phaeophyta and Undaria. Undaria pinnatifida is a seaweed plant, 1 year-old, yellow and brown in color, with a height of 1~2 m and a width of 50~ 100 mm. Its leaves are pinnately lobed and thinner than kelp, hence its name. Undaria pinnatifida is a temperate seaweed, which can tolerate high water temperature. Undaria pinnatifida naturally grows in Zhoushan Islands and Shengsi Island in Zhejiang Province. Now there are also Undaria pinnatifida distributed in Qingdao and Dalian.
Environmental distribution of Undaria pinnatifida: It grows on rocks with a depth of 1 ~ 4m below the low tide line. Distributed in Shandong, Fujian, Zhejiang, Liaoning and other coastal areas. Medicine and food, mainly food. Fresh products can be eaten in summer and autumn or dried for later use. Undaria pinnatifida is mainly produced in Luda and Jinxian in Liaoning, Qingdao, Yantai and Weihai in Shandong, and Zhoushan Islands in Zhejiang. In addition to natural reproduction, artificial reproduction has also begun. Undaria pinnatifida, which grows naturally in Lushun, is called "natural spirulina" in Japan because of its superior geographical location and best quality, and its nutrition can be comparable to that of spirulina.