Gelidium amansii is an economically important species of red algae commonly found in the shallow coast (3 to 10 meters or 10 to 33 feet of depth below the water) of many east Asian countries including North and South Korea, China, Japan, and Singapore. This algae is used to make agar, whose components are the polysaccharide agarose and agaropectin, from the large amount of algin which is located in the algae's cell wall, as well it is sometimes served as part of a salad, puddings, jams, and other culinary dishes in producing regions. Agar is a gelatinous substance that is commercially used as an incubation matrix for microbials and other products that require an ecologically friendly gelatinous matrix. Gelidium amansii can be purple, red, to yellowish red because it contains the class of p