From today, Monaco Explorations welcome a new scientific team (8 members) from MIO (Mediterranean Institute of Oceanography, Aix-Marseille University, France) to cross the Atlantic from Cape Verde to Martinique in search of Sargasso rafts. Sargasses are marine brown seaweeds. This expedition purpose is to identify the processes responsible for the proliferation of this invasive brown algae which is deleterious, depriving coastal life of light and creating big amount of organic matter in putrefaction at shore with dramatic consequences on water, air quality and health in the Caribbean.