Sea green also known as ulva, ulva for the ulva family plants, also called sea green vegetables, sea spinach, individual places called sea fungus. Also known as stone quilt, paper vegetables, sea lettuce, sea cabbage, big belly xiao, oyster skin vegetables. The leaves of ulva, ulva, and other plants in the family ulva. Ulva is distributed from Zhejiang province to Hainan Island, Guangdong Province, as well as the yellow Sea and Bohai Sea coast. Ulva species are found in liaoning, Hebei, Shandong, Jiangsu and other coastal areas and in the East and South China Seas south of the Yangtze River. Winter and spring harvest. Ulva powder, which contains 17% crude protein, is easily absorbed by animals and is a good source of nutrition for animal feed.