sargassum seaweed in the caribbean

algae atlantic beach beaches biosphere blue brown caribbean climate change coast coastline disaster east ecology ecosystem environment environmental global warming gulfweed landscape manzanilla marine mayaro natural nature ocean view oceanography plant pollution problem sand sargasso sargassum seaweed sea seascape seaside shore shoreline tourism travel trinidad tobago tropical unesco world day 2021 fishing boat manzanilla-mayaro located tobago-may