Ishige okamurae is the typical species of the genus Ishige. As I. okamuraeinhabits in upper intertidal zone, an environment of harsh extremes, it has welladapted to oxidative stresses such as intense light and high oxygen concentrations, yetnot been affected by any photodynamic damage, suggesting particular antioxidativemechanism as well as potent antioxidative compounds. But little is known about keygenes or particular metabolic pathways involved in I. okamurae and this summons usup for carrying out global...