Alex Mustard / Pair of Western clown anemonefish (Amphiprion ocellaris) spawning orange eggs on the rock beneath their Magnificent sea anemone (Heteractis magnifica) home on a coral reef. This photo shows the larger...
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SCOTLAND: The Big Picture / Dead man's fingers (Alcyonium digitatum) on a rocky reef with view of the sky, Shetland, Scotland, UK, August.
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Pedro Narra / Black erget (Egretta gularis) displaying, Joao Vieira Poillo , Bijagos Archipellago. Guinea Bissau
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Franco Banfi / Three False clownfish (Amphiprion ocellaris) in Sea anemone (Heteractis magnifica) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.
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Alex Mustard / Diver exploring the wreck of HMS Scylla, which is colonized by Dead man's fingers (Alcyonium digitatum). Whitsands Bay, Cornwall, England. UK, July.
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Andy Rouse / Common wallaroo (Macropus robustus) hopping in late sunlight, Sal Salis, Ningaloo Reef, Cape Range National Park, Western Australia
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Andy Rouse / Common wallaroo (Macropus robustus) in late sunlight, Sal Salis, Ningaloo Reef, Cape Range National Park, Western Australia
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Andy Rouse / Whale shark (Rhincodon typus) filter feeding, surrounded by other smaller fish, Ningaloo Reef, Western Australia
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Andy Rouse / Whale shark (Rhincodon typus) surrounded by other smaller fish, Ningaloo Reef, Western Australia
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Andy Rouse / Whale shark (Rhincodon typus) filter feeding, surrounded by other smaller fish, Ningaloo Reef, Western Australia
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Juergen Freund / Split level of whale shark {Rhincodon typus} and tourist boat, Ningaloo Reef, Western Australia
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Juergen Freund / The wreck of the HMAS Swan, Dunsborough, Western Australia. The wreck has created an artificial coral-reef.
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Juergen Freund / Split-level photograph of coral reef shallows, Rowley Shoals, Western Australia
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Yva Momatiuk & John Eastcott / Adelie Penguin (Pygoscelis adeliae) spreading and flapping wings, Armstrong Reef, western Antarctica
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Yva Momatiuk & John Eastcott / Adelie Penguin (Pygoscelis adeliae) pair, Armstrong Reef, western Antarctica
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Fred Bavendam / Stony Coral (Acropora sp) colony releasing egg-sperm bundles during the mass coral spawning each March at Ningaloo Reef, Western Australia
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Fred Bavendam / Staghorn Coral (Acropora cervicornis) colony releasing egg-sperm bundles during the mass coral spawning each March at Ningaloo Reef, Western Australia
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Fred Bavendam / Blackfinned Clownfish (Amphiprion percula) in Magnificent Sea Anemone (Heteractis magnifica) tentacles, Great Barrier Reef, Queensland, Australia
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Fred Bavendam / Moon Jelly (Aurelia aurita) mass in the plankton-rich waters of Ningaloo Reef, Exmouth, Western Australia, Australia
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Jeff Rotman / Looking up at Whale shark and divers from below {Rhincodon typus} Ningaloo Reef Western Australia
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David Tipling / Coral reef. Kennedy Island, New Georgia Islands, Western Province, Solomon Islands.
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David Tipling / Blacktip reef shark (Carcharhinus melanopterus) group congregating to feed at night. Ghizo, New Georgia Islands, Western Province, Solomon Islands.
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Rick Price / Water running off Montgomery Reef with changing tide. Doubtful Bay, The Kimberley, Western Australia. 2015.
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Rick Price / Tourists in boat watching water running off Montgomery Reef with ebbing tide. Doubtful Bay, The Kimberley, Western Australia. 2015.
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Rick Price / Water starting to run off the reef with ebbing tide. Doubtful Bay, The Kimberley, Western Australia
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Rick Price / Beach stone-curlew (Esacus magnirostris) standing on exposed reef. Montgomery Reef, Doubtful Bay, The Kimberley, Western Australia.
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Graham Eaton / The Carboniferous age Limestone escaprpment of Warrendale Knotts near Settle, North Yorkshire, UK, October
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Jack Dykinga / Cottonwood trees (Populus) in autumn near Fremont River. Capitol Reef National Park, Utah, USA. October 2018.
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SCOTLAND: The Big Picture / Lobster (Homarus gammarus) on a rocky reef, Shetland, Scotland, UK, August.
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SCOTLAND: The Big Picture / Colourful rocky reef with Dead man's finger (Alcyonium digitatum) and Kelp forest, North Sea, Shetland
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SCOTLAND: The Big Picture / Rocky reef with Dead man's fingers (Alcyonium digitatum) community of soft corals and anemones, Scotland, UK, August.
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SCOTLAND: The Big Picture / Soft coral / Dead man's finger (Alcyonium digitatum) growing on a rocky reef with kelp forest above, Scotland, UK, February.
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Pedro Narra / Black erget (Egretta gularis) Joao Vieira Poillo , Bijagos Archipellago. Guinea Bissau
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Pedro Narra / Black erget (Egretta gularis) Joao Vieira Poillo , Bijagos Archipellago. Guinea Bissau
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Pedro Narra / Black erget (Egretta gularis) portrait, Joao Vieira Poillo , Bijagos Archipellago. Guinea Bissau
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Pedro Narra / Black erget (Egretta gularis) Joao Vieira Poillo, Bijagos Archipellago. Guinea Bissau
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Pedro Narra / Black erget (Egretta gularis) Joao Vieira Poillo, Bijagos Archipellago. Guinea Bissau
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Nick Upton / Honeycomb worm (Sabellaria alveolata) reef. Clustered tubes built of sand grains attached to rocks, exposed at low tide. Duckpool Beach, Cornwall, Devon, UK. September 2018.
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Alex Mustard / Edible crab (Cancer pagurus) feeding on a bivalve on a chalk reef. Sherringham, north Norfolk, England, United Kingdom. North Sea
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Alex Mustard / Portrait of an Olive squat lobster (Galathea squamifera) on a chalk reef. Sherringham, north Norfolk, England, UK. North Sea
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Alex Mustard / Portrait of an Edible crab (Cancer pagurus) on a chalk reef. Sherringham, north Norfolk, England, United Kingdom. North Sea
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Alex Mustard / Hermit crab (Pagurus bernhardus) on a chalk nodule on a chalk reef. Sherringham, north Norfolk, England, United Kingdom. North Sea
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Alex Mustard / Portrait of a butterfish (Pholis gunnellus) in seaweeds, on a chalk reef. Sheringham, north Norfolk, England, United Kingdom. North Sea
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Chris Mattison / Part of a colony of Honeycomb worms (Sabellaria alveolata) a reef-forming polychaete worm, exposed at low tide. Nash Point, Glamorgan, Wales, UK.
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Bernard Castelein / Western reef egret (Egretta gularis) taking off, Gambia.
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Bernard Castelein / Western reef egret (Egretta gularis) taking off, Gambia.
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Bernard Castelein / Western reef egret (Egretta gularis) taking off into flight, Gambia.
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Bernard Castelein / Western reef egret (Egretta gularis) taking off in flight, Gambia.
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Bernard Castelein / Western reef egret (Egretta gularis) wading with fish in beak, Gambia.
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Bernard Castelein / Western reef egret (Egretta gularis), Gambia.
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Bernard Castelein / Western reef egret (Egretta gularis) hunting fish caught in pools at low tide, Gambia.
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Bernard Castelein / Western reef egret (Egretta gularis) hunting fish caught in pools at low tide, Gambia.
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David Fleetham / Hawaiian / Western Lobster (Enoplometopus occidentalis), endemic to the tropical Indo-Pacific. Hawaii.
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Doug Perrine / Divers approach Whitetip reef shark (Triaenodon obesus) resting inside cavern, Gato Island, off Malapascua, Cebu, Philippines. Visayan Sea, Western Pacific Ocean.
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Jack Dykinga / Capitol Reef National Park, after sunset, Utah, USA, October 2017.
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Franco Banfi / False clownfish (Amphiprion ocellaris) and a Commensal shrimp (Periclimenes / Ancylomenes tosaensis) in a Sea anemone (Heteractis magnifica) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Ph...
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Jack Dykinga / Navajo Dome at dawn with autumn coloured Cottonwoods (Populus) lining the Fremont River Capitol Reef National Park, Utah, USA, October 2017.
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Luis Quinta / Black erget (Egretta gularis) Island of Principe UNESCO Biosphere Reserve, Democratic Republic of Sao Tome and Principe, Gulf of Guinea.
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Luis Quinta / Black erget (Egretta gularis) Island of Principe UNESCO Biosphere Reserve, Democratic Republic of Sao Tome and Principe, Gulf of Guinea.
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Juergen Freund / Replica of dinosaur footprints on Gantheaume Point. The real dinosaur footprints preserved in reef rock can be seen at very low tide at the bottom of the cliff, Kimberley, Western Australia. July 2016...
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Staffan Widstrand / Eastern reef egret (Egretta sacra) in flight, Lenguru river, near Lobo village, Triton Bay, mainland New Guinea, Western Papua, Indonesian New Guinea
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Staffan Widstrand / Blacktip reef sharks (Carcharhinus melanopterus) swimming in shallows with shoal of fish, Raja Ampat, Western Papua, Indonesian New Guinea
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Staffan Widstrand / Swimming with Blacktip reef shark (Carcharhinus melanopterus) Raja Ampat, Western Papua, Indonesian New Guinea
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Jouan Rius / Fruita farm house, Capitol Reef National Park, Utah, USA, March 2014.
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Jouan Rius / Sandstone hoodoo and basalt boulders, Capitol Reef National Park, Utah, USA, March 2014.
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Jouan Rius / Eroded sandstone cliffs, Capitol Reef National Park, Utah, USA, March 2014.
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Jouan Rius / Globemallow (Sphaeralcea sp) flowers, Capitol Reef National Park, Utah, USA, April.
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Jouan Rius / Indian paintbrush in flower (Castilleja coccinea), Capitol Reef National Park, Utah, USA, April.
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Jouan Rius / Claret Cup Cactus in flower (Echinocereus triglochidiatus), Capitol Reef National Park, Utah, USA, April.
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Jouan Rius / Waterpocket fold in Capitol Reef National Park, Utah, USA, March 2014.
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Juan Carlos Munoz / Capitol Reef National Park, Utah, USA, 2016.
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Juan Carlos Munoz / Fremont petroglyphs, Capitol Reef National Park, Utah, USA, 2016.
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Juan Carlos Munoz / Capitol Reef National Park, Utah State Route 24, Utah, Usa, North America, America
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Juan Carlos Munoz / Fremont petroglyphs, Capitol Reef National Park, Utah, USA, 2016.
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Juan Carlos Munoz / Capitol Reef National Park, Utah, USA, 2016.
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Sue Daly / Reef wall with Dead man's fingers soft coral (Alcyonium digitatum), Isle of Man, July.
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Sue Daly / Reef wall with Edible sea urchin (Echinus esculentus) and Dead man's fingers soft coral (Alcyonium digitatum), Isle of Man, July.
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Sue Daly / Les Ecrehous reef, Jersey, British Channel Islands, June 2015
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Sue Daly / Les Ecrehous reef, Jersey, British Channel Islands, June 2015
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Frederique Olivier / Whale shark (Rhincodon typus) swimming near the surface, Ningaloo Reef, Western Australia.
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Frederique Olivier / Whale shark (Rhincodon typus) swimming near the surface, Ningaloo Reef, Western Australia.
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Frederique Olivier / Whale shark (Rhincodon typus) swimming near the surface, interacting with tourists, Ningaloo Reef, Western Australia, 2014.
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Frederique Olivier / Whale shark (Rhincodon typus) swimming near the surface, interacting with tourists, Ningaloo Reef, Western Australia, 2014.
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Frederique Olivier / Whale shark (Rhincodon typus) swimming near the surface, interacting with tourists, Ningaloo Reef, Western Australia, 2014.
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Frederique Olivier / Whale shark (Rhincodon typus) swimming near the surface, interacting with tourists, Ningaloo Reef, Western Australia, 2014.
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Frederique Olivier / Whale shark (Rhincodon typus) swimming near the surface, Ningaloo Reef, Western Australia.
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Frederique Olivier / Whale shark (Rhincodon typus) swimming near the surface feeding, with tourists nearby, Ningaloo Reef, Western Australia, 2014.
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Frederique Olivier / Whale shark (Rhincodon typus) swimming near the surface, Ningaloo Reef, Western Australia.
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Frederique Olivier / Whale shark (Rhincodon typus) swimming near the surface, interacting with tourists, Ningaloo Reef, Western Australia, 2014.
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Frederique Olivier / Whale shark (Rhincodon typus) swimming near the surface, approaching a tourist boat, Ningaloo Reef, Western Australia, 2014.
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Frederique Olivier / Whale shark (Rhincodon typus) feeding near the surface, with tourists watching nearby, Ningaloo Reef, Western Australia, 2014.
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Frederique Olivier / Close up of a Whale shark (Rhincodon typus) feeding near the surface, with tourists watching nearby, Ningaloo Reef, Western Australia, 2014.
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Frederique Olivier / Close-up of a Whale shark (Rhincodon typus) swimming near the surface, with Remora (Echeneis), Ningaloo Reef, Western Australia, 2014.
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Frederique Olivier / Whale shark (Rhincodon typus) swimming near the surface, Ningaloo Reef, Western Australia.
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Frederique Olivier / Whale shark (Rhincodon typus) swimming near the surface, interacting with tourists, Ningaloo Reef, Western Australia, 2014.
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Sue Daly / Male Cuckoo wrasse (Labrus mixtus) swimming past a reef wall covered in Jewel anemones (Corynactis viridis), Sark, British Channel Islands, UK, July.