Mozuku is a unique Okinawan seaweed. Scientifically known as Cladosiphon okamuranus,this alga is approved in Japanese cuisine, and it has been farmed for more than 35 years. The cultivation of this seaweed is a key element in the economy of Okinawa: in 2006, or the Japanese Cabinet Office estimated a 20000 ton production,with an economic value of billions of Yen. 99% of this seaweed is produced in Okinawa, almost entirely farmed by humans. When in 2015 the production dropped for causes related with the higher temperature of the ocean, and political institutions and research centres started to coordinate in order to develop a strategy to preserve this Okinawan treasure.
Source: phys.org