spherical colony of cyanobacteria gleotrichia, blue-green algae

algae aquatic background bacteria biology blue botanical botany brightfield close cluster colony cyanobacteria cyanobacterial cyanophyceae cyanophyta ecology enlarge enlarged fiber fibers filament filaments gleotrichia green illumination light live macro magnification magnify micrograph microphotograph microphotography microscopic microscopy nature organism photosynthesis photosynthetic prokaryote science scientific spherical transmitted white