1349-726 - Phytoplankton bloom off Ireland, satellite image

832-154464 - Aerial view, salt crust coloured red by cyanobacteria, Lake Natron, Great Rift Valley, Tanzania, Africa

832-150715 - Stromatolites, Earth's oldest fossils, Hamelinbay, Northwest Australia

832-150716 - Stromatolites, Earth's oldest fossils, Hamelinbay, Northwest Australia

832-154463 - Aerial view, salt crust coloured red by cyanobacteria, Lake Natron, Great Rift Valley, Tanzania, Africa

698-2284 - Wooden boardwalk and cyanobacteria thermophile formations on Geyser Hill, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

252-11230 - Water rich in blue-green algae (cyanobacteria), mineral salts and fine silica mud at the geothermal spa that owes its existence to the Svartsengi geothermal power plant, Blue Lagoon, near Reykjavik, Iceland, Polar Regions

252-11229 - Water rich in blue-green algae (cyanobacteria), mineral salts and fine silica mud at the geothermal spa that owes its existence to the Svartsengi geothermal power plant, Blue Lagoon, near Reykjavik, Iceland, Polar Regions

252-11228 - Water rich in blue-green algae (cyanobacteria), mineral salts and fine silica mud at the geothermal spa that owes its existence to the Svartsengi geothermal power plant, Blue Lagoon, near Reykjavik, Iceland, Polar Regions