829-890 - The Hartbeespoort Dam bypass channel in South Africa's North West Province. The water is green due to algae.

796-1080 - Scene around Blue Rocks in Lunenburg Harbour, Nova Scotia, Canada, North America

829-894 - The Hartbeespoort dam in South Africa's North West Province. The water is green due to algae growth.

817-40045 - Sea Lettuce seaweed (Ulva rigida), Galicia, Spain

817-40120 - Seaweeds: Cystoseira baccata

817-10502 - Tropical reef fish (Acanthurids) feed on the algae growing in the Green sea turtles (Chelonia mydas) back, Hawaii

759-7038 - Killer Algae Caulerpa, Caulerpa, Mediterranean Sea, France

796-271 - Bloody Beach Peleiu, Republic of Palau, Pacific

799-327 - Quartz veins in the rock bed at Crackington Haven, Cornwall, England, United Kingdom, Europe

641-12227 - Punta Cantor, Valdes Peninsula, Patagonia, Argentina, South America

759-5819 - Green Turtle feeding Algas, Chelonia mydas, Oahu, Pacific Ocean, Hawaii, USA

759-5817 - Green Turtle at Haleiwa Beach Park, Chelonia mydas, Oahu, Pacific Ocean, Hawaii, USA

799-114 - Stone jetty in Swanage Harbour, Swanage, Dorset, England, United Kingdom, Europe

799-112 - Seaweed washed up on Studland Bay shore at dawn, with Old Harry Rocks in the distance, Studland, Dorset, England, United Kingdom, Europe

799-41 - Algae covered rocks at Tregardock Beach, North Cornwall, England, United Kingdom, Europe

799-40 - Vibrant green algae exposed at low tide at Tregardock Beach, North Cornwall, England, United Kingdom, Europe

748-1093 - Hanson Bay, Kangaroo Island, South Australia, Australia, Pacific

741-2549 - Grand Prismatic Spring in winter, Lower Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2255 - Eruption of Castle Geyser with rainbow in the spray, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2301 - Female tourist on boardwalk by the Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2300 - Female tourist on boardwalk by the Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2298 - Tourists on the boardwalk around the Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2294 - Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2290 - Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2289 - Excelsior Pool, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2288 - Grand Prismatic Spring and Excelsior Pool behind, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2287 - Sapphire Pool, Biscuit Basin, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2286 - Crested Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2285 - Grand Geyser erupting over sinter terrace, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

698-2283 - Wooden boardwalk over the mineral sinter formations on Geyser Hill, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2281 - Blue Star Spring, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2274 - Castle Geyser erupting, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2272 - Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2273 - Castle Geyser erupting, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2268 - Tourists on boardwalk over the mineral runoff from Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2265 - Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2259 - Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2256 - Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2254 - Whirligig Geyser runoff, Porcelain Basin, Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

698-2252 - Whirligig Geyser runoff, Porcelain Basin, Norris 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

752-1503 - Reflection of clouds in water, Okefenokee National Wildlife Refuge, Georgia, USA

29-2605 - Morning Glory Pool, a geothermal pool, colours are due to algae at temperature bands, hotter below, Yellowstone National Park, Wyoming, USA

465-2009 - Featherstars perch on the edge of Gorgonian Sea Fans to feed in the current, Fiji, Pacific Ocean

478-340 - Pentire Point, Polzeath, Cornwall, England, UK

748-302 - Beach at the coast, Kangaroo Island, South Australia, Australia

255-6559 - Cap Frehel, Cotes d'Armor, Emerald Coast near St. Malo, Brittany, France, Europe

321-3936 - View towards islands of Harris and Lewis from Taransay, Outer Hebrides, Scotland, United Kingdom, Europe

724-1269 - Crevettes (prawns), Le Bistrot de Bernard, Ars, Ile de Re, Charente Maritime, France, Europe

743-527 - Applecross beach, Wester Ross, Scotland, United Kingdom, Europe

749-8 - Young woman carrying seaweed from the ocean on her back, Zanzibar, Tanzania, East Africa, Africa

749-3 - Man and woman working in seaweed cultivation, Zanzibar, Tanzania, East Africa, Africa

749-34 - Two women working in seaweed cultivation, Zanzibar, Tanzania, East Africa, Africa

749-9 - Two smiling Zanzibari women working in seaweed cultivation, Zanzibar, Tanzania, East Africa, Africa

665-145 - Ile Molene (Ile de Molene) (Molene Island), Brittany, France, Europe

385-1168 - Algae in the hot springs at Orakei Korako, South Auckland, North Island, New Zealand, Pacific

698-1509 - Seaweed on beach, Mellon Udrigle, Wester Ross, Highland region, Scotland, United Kingdom, Europe

465-703 - Mussels and seaweed on the tidal seashore, Cullen, Scotland, United Kingdom, Europe

749-6 - Seaweed drying in the sun, Uroa beach, Zanzibar, Tanzania, East Africa, Africa

252-1258 - Seaweed farming, Rebun Island, Hokkaido, Japan, Asia

252-1266 - Seaweed farmer, Rebun Island, Hokkaido, Japan, Asia

759-1863 - Macro algal seaweed, Caulerpa prolifera, Croatia, Istria, Mediterranean Sea

759-1545 - algae drifts in water, Austria, Tirol