Alginic no single cell, all for multicellular plants, the simplest is branched filaments from single cells, such as my husband Chlorophyta (Ectocarpales); evolution of species, similar to the root, stem, leaf differentiation, have even with a balloon structure, such as kelp mesh (Laminariales) can help the algae floating in the sea, internal organization, there are differentiated epidermis, cortex and pith, the body generally more bulky, can grow to more than 60 meters long, blooms the formation of marine algal forest or sea, attracting marine life collection, brings a wealth of marine resources. Kelp alginate more hi distributed in colder waters, warmer waters around Taiwan, so no huge kelp growth, then rich Sargasso, every three or April, often forming small "Sargasso Sea", up to two or three meters the Sargasso long past will haunt BUTTERFLY! Zoospores or gametes brown algae, with chloroplasts, eyespot and two lateral flagella of unequal length, flagellum as long ago after a short and long flagellum has two columns cilia, short flagellum is smooth without cilia. In pigment, in addition to chlorophyll a, c, carotene and lutein addition, brown algae generally contain a large number of yellow-orange of fucoxanthin (fucoxanthin), it is mostly brown. Its photosynthetic products for oil, starch, alginate (Laminarin) and mannitol (mannitol Rubber-rich algae cell wall material, with properties of colloidal or thick, it is often used to add a variety of foods, or the textile industry, rubber industry and other industrial uses. Many brown algae can be eaten, common with kelp, seaweed, kelp and other small, because it contains a lot of vitamins and inorganic salts, often regarded as a nutritional supplement food, and more on the use of medicine for thousands of years of history, ancient medical books "Compendium of Materia Medica "," Ben Cao Jing Shu "kelp class has long been documented on the treatment of goiter, gall knot gas, edema, diuretic, to other functions, modern medical research has also been shown to lower blood pressure and some brown algae and anti-cancer effect, even the use of alginate made anticoagulants, hemostatic agents, blood plasma substitute, hemostatic gauze, hemostatic sponge, medicine impression, cream base, etc., with high economic value.