Blue-green pelagic cyanobacteria (Trichodesmium sp.), is also known as cyanophyta and sea sawdust . Cyanobacteria are bacteria that obtain their energy through photosynthesis. Trichodesmium cyanobacteria are filamentous diazotrophs, able to fix atmospheric nitrogen. This image was captured at night with the bottom 3000+ feet below, several miles off the island of Guam, Micronesia around the Mariana Islands in the Philippine Sea; Guam, Micronesia