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Morning Glory Pool, a geothermal pool, colours are due to algae at temperature bands, hotter below, Yellowstone National Park, Wyoming, USA
Featherstars perch on the edge of Gorgonian Sea Fans to feed in the current, Fiji, Pacific Ocean
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
Vibrant green algae exposed at low tide at Tregardock Beach, North Cornwall, England, United Kingdom, Europe
Algae covered rocks at Tregardock Beach, North Cornwall, England, United Kingdom, Europe
Seaweed washed up on Studland Bay shore at dawn, with Old Harry Rocks in the distance, Studland, Dorset, England, United Kingdom, Europe
Stone jetty in Swanage Harbour, Swanage, Dorset, England, United Kingdom, Europe
Quartz veins in the rock bed at Crackington Haven, Cornwall, England, United Kingdom, Europe
Bloody Beach Peleiu, Republic of Palau, Pacific
Saltwater (estuarine) crocodile (Crocodylus porosus), Sarawak, Borneo, Malaysia, Southeast Asia, Asia
Dusk over Penmon Point Lighthouse and Puffin Island, Isle of Anglesey, Wales, United Kingdom, Europe
Algae lined rockpools on the coast at Gasadalur on the island of Vagar, Faroe Islands, Denmark, Europe
An algae-clad stone groyne at Mudeford, Dorset, England, United Kingdom, Europe
Algae covered rocks at sunrise at Church Ope Cove, Portland, Jurassic Coast, UNESCO World Heritage Site, Dorset, England, United Kingdom, Europe
Algae covered pebbles at Church Ope Cove at dawn Portland, Jurassic Coast, UNESCO World Heritage Site, Dorset, England, United Kingdom, Europe
The rocky shore of West Weares on Portland, looking towards Chesil Beach, Jurassic Coast, UNESCO World Heritage Site, Dorset, England, United Kingdom, Europe
Stair Hole near to Lulworth Cove, Jurassic Coast, UNESCO World Heritage Site, Dorset, England, United Kingdom, Europe
Edible algae provides a pink hue to the Hutt Pink Lagoon, Port Gregory, Western Australia, Australia, Pacific
Edible algae provides a pink hue to the Hutt Pink Lagoon, Port Gregory, Western Australia, Australia, Pacific
Pool runoff of orange bacteria and algae (Therophiles), Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Traditional sea salt production, Salinas de Janubio, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Southerness Lighthouse, Solway Coast, Dumfries and Galloway, Scotland, United Kingdom, Europe
Nudibranch on coral, Papua New Guinea, Pacific
The shell of Hawaiian reef lobster (Enoplometopus occidentalis), covered in algae and parasitic barnacles, Hawaii, United States of America, Pacific, North America
A garibaldi (Hypsypops rubicundus) in a forest of giant kelp off Catalina Island, California, United States of America, North America
Sabellaria alveolata honeycomb worm reef, Mimid beach, Sidi Boufdail, Mirleft, Morocco, North Africa, Africa
Saint Nazaire Cathedral and Pont Vieux (Old Bridge), Beziers, Herault, Languedoc-Roussillon, France, Europe
Scene around Blue Rocks in Lunenburg Harbour, Nova Scotia, Canada, North America
Castle Geyser erupting, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Algae coated rock pools at sunset on the basalt rock ledge seashore of Gjogv in the Faroe Islands, Denmark, Europe
Roots of Giant Kelp, Macrocystis pyrifera, San Benito Island, Mexico
Waterfall near the Old Man of Storr on the Isle of Skye, Inner Hebrides, Scotland, United Kingdom, Europe
Kelp Forest Giant Kelp, Macrocystis pyrifera, San Benito Island, Mexico
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
Kelp Forest Giant Kelp, Macrocystis pyrifera, San Benito Island, Mexico
Hanson Bay, Kangaroo Island, South Australia, Australia, Pacific
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Small stream cascading over rocks in mountains of Kilauea, Kauai, Hawaii, United States of America, Pacific
Beach at the coast, Kangaroo Island, South Australia, Australia
Excelsior Pool, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Trees covered by orange trentepohlia, Waiotapu Thermal Area, Rotorua, North Island, New Zealand, Pacific
Kelp Forest Giant Kelp, Macrocystis pyrifera, San Benito Island, Mexico
Crested Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Sapphire Pool, Biscuit Basin, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Kelp at Coast of Cedros, Macrocystis pyrifera, Cedros Island, Mexico
Elegant lichens cover the rocks at Gnalodden, Hornsund, Spitsbergen, Svalbard, Arctic, Norway, Europe
Cap Frehel, Cotes d'Armor, Emerald Coast near St. Malo, Brittany, France, Europe
Pentire Point, Polzeath, Cornwall, England, UK
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
Kelp Forest Giant Kelp, Macrocystis pyrifera, San Benito Island, Mexico
Red algae, Komodo, Indonesia, Southeast Asia, Asia
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
Marine Mucilage in Ocean, Florida Islands, Solomon Islands
Kelp Forest Giant Kelp, Macrocystis pyrifera, San Benito Island, Mexico
Marine Mucilage in Ocean, Florida Islands, Solomon Islands
Kelp Forest Giant Kelp, Macrocystis pyrifera, San Benito Island, Mexico
Laguna Colorada on the Altiplano, Potosi Department, Bolivia, South America
Laguna Colorada on the Altiplano, Potosi Department, Bolivia, South America
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
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
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
Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
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
Vibrant sea cucumbers, tunicates, hydroids, and other invertebrates cling to a reef in Raja Ampat, Indonesia.
Sally lightfoot crab (Grapsus grapsus) in the littoral of the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Aerial view by drone of swirls of green algae in a freshwater lake, Roadford Lake, Devon, England, United Kingdom, Europe
Rock formations and reflection, Tungeneset, Senja, Norway, Scandinavia, Europe
The intertidal zone of the Quantock Coast, West Somerset, contains an abundance of geology and wildlife. It is a Site of Special Scientific Interest (SSSI) and is of international geological importance.
Rocks at Castle Sands in St. Andrews, Fife, Scotland, United Kingdom, Europe
Grand Geyser erupting over sinter terrace, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
A small red starfish clings to coralline algae in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.
A blue starfish, Linkia laevigata, clings to coralline algae on a reef in Sulawesi, Indonesia.
Whale bone on a beach, Baffin island, Nunavut, Canadian Arctic, Canada, North America
Algae on an ice block, Baffin island, Nunavut, Canadian Arctic, Canada, North America
Adult green sea turtle (Chelonia mydas agassizii) underwater off the west side of Isabela, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Vibrant pink water lily blooming in a tranquil pond with green algae and lily pads, reflecting serene beauty in nature at Kew Gardens, London, England, United Kingdom, Europe
Wulaia Bay, Navarino island, Tierra del Fuego, Patagonia, Chile, South America
Lotus (Nelumbo nucifera) at the mouth of the Wadi Shab, canyon near Tiwi, Sultanate of Oman, Arabian Peninsula
Green sea turtle (Chelonia mydas), surfacing for air near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize
A cute red-spotted blenny, Blenniella chrysospilos, looks out from its protective home on a coral reef in Indonesia. This combtooth blenny feeds on algae.
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) feeding underwater in the Galapagos, UNESCO World Heritage Site, Ecuador, South America
A myriad of hard and soft corals, as well as tropical reef fish at Vatu-I-Ra Conservation Park on Viti Levu, Fiji, South Pacific, Pacific
Red and green algae-covered snow on Petermann Island, Antarctica, Southern Ocean, Polar Regions
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Patterns in the kelp at low tide on South Georgia Island, Southern Ocean
Patterns in the kelp at low tide on New Island in the Falkland Islands
Patterns in the kelp at low tide on New Island in the Falkland Islands
Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize
Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize
Nurse sharks (Ginglymostoma cirratum), being fed in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize
Soft corals and sponges underwater on Long Caye in the Mesoamerican Barrier Reef, Belize
Dead and dying pink salmon (Oncorhynchus gorbuscha) gathering after the spawn just outside of Sitka, Alaska, United States of America
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) feeding on algae at low tide in the Galapagos, UNESCO World Heritage Site, Ecuador, South America
The Lindblad Expedition ship National Geographic Explorer in the Svalbard Archipelago, Norway, Arctic, Europe
Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize
Adult brown bear (Ursus arctos) feeding on humpback whale carcass in Glacier Bay National Park, Alaska, United States of America
A rocky shoreline covered with clusters of blue-black mussels. The mussels cling tightly to the rocks, creating a textured surface. Some green algae is visible in the water pools among the rocks, reflecting sunlight.