Sargassum muticum (Japanese Wireweed) is a species of brown algae in the family Sargassaceae. It is associated with freshwater habitat. It is native to South Korea, China, Japan, North Korea, and Russia.
Definition: An aquatic biome that comprises systems of open-ocean and unprotected coastal habitats, characterized by exposure to wave action, tidal fluctuation, and ocean currents as well as systems that largely resemble these. Water in the marine biome is generally within the salinity range of seawater: 30 to 38 ppt.