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Grooved brain coral (Diploria labyrinthiformis) at night with polyps extended to feed, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.
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Alex Mustard / Grooved brain coral (Diploria labyrinthiformis) at night with polyps extended to feed, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.
Synchronous spawning of a mountainous star coral (Montastraea faveolata) at night. East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.
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Alex Mustard / Synchronous spawning of a mountainous star coral (Montastraea faveolata) at night. East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.
Pink sea fan / Warty coral (Eunicella verrucosa) with attached eggs of a Common squid (Loligo vulgaris), eggcase of a Lesser-spotted dogfish (Scyliorhinus canicula), and Spiny starfish (Marthasterias...
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Linda Pitkin / 2020VISION / Pink sea fan / Warty coral (Eunicella verrucosa) with attached eggs of a Common squid (Loligo vulgaris), eggcase of a Lesser-spotted dogfish (Scyliorhinus canicula), and Spiny starfish (Marthasterias...
Sunset cup coral / Yellow cave coral (Leptopsammia pruvoti), on sponge covered rock face, Lundy Island Marine Conservation Zone, Devon, England, UK, May
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Linda Pitkin / 2020VISION / Sunset cup coral / Yellow cave coral (Leptopsammia pruvoti), on sponge covered rock face, Lundy Island Marine Conservation Zone, Devon, England, UK, May
Boulder star coral (Montastraea annularis) spawning at night with released bundles of eggs and sperm floating away in the water column, East End, Grand Cayman, Cayman Islands, British West Indies, Car...
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Alex Mustard / Boulder star coral (Montastraea annularis) spawning at night with released bundles of eggs and sperm floating away in the water column, East End, Grand Cayman, Cayman Islands, British West Indies, Car...
A large colony of Mountainous star coral (Montastraea faveolata) spawning at night on a coral reef, showing the synchronous release of bundles of eggs and sperm, East End, Grand Cayman, Cayman Islands...
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Alex Mustard / A large colony of Mountainous star coral (Montastraea faveolata) spawning at night on a coral reef, showing the synchronous release of bundles of eggs and sperm, East End, Grand Cayman, Cayman Islands...
Staghorn corals (Acropora) on the coast of tropical  island Ofu, one of the Manu'a islands, American Samoa. 2012.
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Floris van Breugel / Staghorn corals (Acropora) on the coast of tropical island Ofu, one of the Manu'a islands, American Samoa. 2012.
Split level view of a Beadlet anemone (Actinia equina) attached to a boulder encrusted with Maerl (Lithothamnion glaciale) a red coralline alga, in a large rockpool, Crail, Scotland, UK, July
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Nick Upton / Split level view of a Beadlet anemone (Actinia equina) attached to a boulder encrusted with Maerl (Lithothamnion glaciale) a red coralline alga, in a large rockpool, Crail, Scotland, UK, July
Solenosmilia sp and eunicid polychaete and bamboo coral. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.
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David Shale / Solenosmilia sp and eunicid polychaete and bamboo coral. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.
Black coral (Antipatharia) with tendrils extruded to catch prey. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.
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David Shale / Black coral (Antipatharia) with tendrils extruded to catch prey. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.
Devonshire cup coral (Caryophyllia smithii) photographed under deep blue light to reveal its fluorescent pigments, showing up as green in this photo. Plymouth Sound, Devon, UK, English Channel, July
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Alex Mustard / 2020VISION / Devonshire cup coral (Caryophyllia smithii) photographed under deep blue light to reveal its fluorescent pigments, showing up as green in this photo. Plymouth Sound, Devon, UK, English Channel, July
Secretary blenny (Acanthemblemaria maria) making a home in a deserved worm tube of a great star coral (Montastraea cavernosa), East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Se...
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Alex Mustard / Secretary blenny (Acanthemblemaria maria) making a home in a deserved worm tube of a great star coral (Montastraea cavernosa), East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Se...
Yellow fan coral / Seafan (Paramuricea clavata)  amongst mass of invasive algae (Caulerpa taxifolia) with Rainbow wrasse fish (Coris julis), Strait of Messina, Southern Italy
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Roberto Rinaldi / Yellow fan coral / Seafan (Paramuricea clavata) amongst mass of invasive algae (Caulerpa taxifolia) with Rainbow wrasse fish (Coris julis), Strait of Messina, Southern Italy
Alcyonarian Coral (Dendronephthya spp.) polyps open and feeding. Red Sea, Egypt.
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Jeff Rotman / Alcyonarian Coral (Dendronephthya spp.) polyps open and feeding. Red Sea, Egypt.
Leather Coral (Sinularia flexibilis). Komodo National Park, Indonesia.
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Georgette Douwma / Leather Coral (Sinularia flexibilis). Komodo National Park, Indonesia.
Soft Coral (Dendronephthya sp) with Blueline snappers (Lutjanus kasmira). Rinca, Komodo National Park, Indonesia.
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Georgette Douwma / Soft Coral (Dendronephthya sp) with Blueline snappers (Lutjanus kasmira). Rinca, Komodo National Park, Indonesia.
Green turtles (Chelonia mydas) mating over coral reef, Sipadan Island, Sabah, Malaysia, June, Endangered species
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Juergen Freund / Green turtles (Chelonia mydas) mating over coral reef, Sipadan Island, Sabah, Malaysia, June, Endangered species
Split level image of Papuan fisherman standing on his dugout canoe over shallow corals, New Ireland, Papua New Guinea, June 2010
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Juergen Freund / Split level image of Papuan fisherman standing on his dugout canoe over shallow corals, New Ireland, Papua New Guinea, June 2010
Crinoids or featherstars covering a coral bommie with dive boat looming overhead, West New Britain, Papua New Guinea
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Juergen Freund / Crinoids or featherstars covering a coral bommie with dive boat looming overhead, West New Britain, Papua New Guinea
Tiny reef crab on soft coral, West New Britain, Papua New Guinea.
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Juergen Freund / Tiny reef crab on soft coral, West New Britain, Papua New Guinea.
Gorgonian fan coral with Featherstar / crinoid attached, West New Britain, Papua New Guinea.
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Juergen Freund / Gorgonian fan coral with Featherstar / crinoid attached, West New Britain, Papua New Guinea.
Hard corals showing bleaching caused by heat stress, West New Britain, Papua New Guinea, May 2010.
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Juergen Freund / Hard corals showing bleaching caused by heat stress, West New Britain, Papua New Guinea, May 2010.
Healthy coral reef in the shallows, West New Britain, Papua New Guinea.
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Juergen Freund / Healthy coral reef in the shallows, West New Britain, Papua New Guinea.
Orange cup coral (Tubastrea faulkneri) with polyps open, Batangas, Philippines.
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Juergen Freund / Orange cup coral (Tubastrea faulkneri) with polyps open, Batangas, Philippines.
Orange cup coral (Tubastrea faulkneri) detail of mouth and tentacles, Batangas, Philippines.
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Juergen Freund / Orange cup coral (Tubastrea faulkneri) detail of mouth and tentacles, Batangas, Philippines.
Blue sea star on massive Boulder coral (Gardineroseris planulata) North Sulawesi, Indonesia. This coral species is normally found from the Red Sea to Central America, and is relatively uncommon in the...
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Juergen Freund / Blue sea star on massive Boulder coral (Gardineroseris planulata) North Sulawesi, Indonesia. This coral species is normally found from the Red Sea to Central America, and is relatively uncommon in the...
Coral reef landscape with abundant whip corals, Blue sea stars and hard coral, North Sulawesi, Indonesia, October 2009.
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Juergen Freund / Coral reef landscape with abundant whip corals, Blue sea stars and hard coral, North Sulawesi, Indonesia, October 2009.
Large round Brain coral (Platygyra lamellina) on coral reef, North Sulawesi, Indonesia.
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Juergen Freund / Large round Brain coral (Platygyra lamellina) on coral reef, North Sulawesi, Indonesia.
Large round Brain coral (Platygyra lamellina) on coral reef, North Sulawesi, Indonesia.
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Juergen Freund / Large round Brain coral (Platygyra lamellina) on coral reef, North Sulawesi, Indonesia.
Coral reef with hard corals and cabbage coral, Komodo NP, Indonesia
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Juergen Freund / Coral reef with hard corals and cabbage coral, Komodo NP, Indonesia
Gorgonian fan coral with crinoids / featherstars, Kimbe Bay, West New Britain, Papua New Guinea
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Juergen Freund / Gorgonian fan coral with crinoids / featherstars, Kimbe Bay, West New Britain, Papua New Guinea
Diver swimming over massive boulder / Cauliflower coral (Gardineroseris planulata) Buyat Bay, Sulawesi, Indonesia.
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Juergen Freund / Diver swimming over massive boulder / Cauliflower coral (Gardineroseris planulata) Buyat Bay, Sulawesi, Indonesia.
Massive boulder / Cauliflower coral (Gardineroseris planulata) with blue sea star, Buyat Bay, Sulawesi, Indonesia, Indo-pacific.
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Juergen Freund / Massive boulder / Cauliflower coral (Gardineroseris planulata) with blue sea star, Buyat Bay, Sulawesi, Indonesia, Indo-pacific.
Fluorescent corals. Misool, Raja Ampat, West Papua, Indonesia
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Juergen Freund / Fluorescent corals. Misool, Raja Ampat, West Papua, Indonesia
Soft coral (Alcyonacea) in the shallow mangroves with diver, split level. North Raja Ampat, West Papua, Indonesia, February 2010
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Juergen Freund / Soft coral (Alcyonacea) in the shallow mangroves with diver, split level. North Raja Ampat, West Papua, Indonesia, February 2010
Bean shaped polyps of an Anchor coral (Euphyllia ancora), a large polyp stony (LPS) coral. Misool, Raja Ampat, West Papua, Indonesia.
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Juergen Freund / Bean shaped polyps of an Anchor coral (Euphyllia ancora), a large polyp stony (LPS) coral. Misool, Raja Ampat, West Papua, Indonesia.
Detail of a soft coral (Dendronephthya sp). Misool, Raja Ampat, West Papua, Indonesia
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Juergen Freund / Detail of a soft coral (Dendronephthya sp). Misool, Raja Ampat, West Papua, Indonesia
Fluorescent corals, Misool, Raja Ampat, West Papua, Indonesia
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Juergen Freund / Fluorescent corals, Misool, Raja Ampat, West Papua, Indonesia
Coral trout / Leopard coral grouper (Plectropomus leopardus) mating behaviour. Males approach the females and display with their bodies and fins. Misool, Raja Ampat, West Papua, Indonesia,
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Juergen Freund / Coral trout / Leopard coral grouper (Plectropomus leopardus) mating behaviour. Males approach the females and display with their bodies and fins. Misool, Raja Ampat, West Papua, Indonesia,
Hard brain coral (Platygyra sp) half covered with a pink algae, Moluccas Islands, Indo-pacific
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Juergen Freund / Hard brain coral (Platygyra sp) half covered with a pink algae, Moluccas Islands, Indo-pacific
Whip coral (Gorgonaceae) Komodo NP, Indonesia
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Juergen Freund / Whip coral (Gorgonaceae) Komodo NP, Indonesia
Blue soft corals, Lembeh Strait, North Sulawesi, Indonesia.
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Juergen Freund / Blue soft corals, Lembeh Strait, North Sulawesi, Indonesia.
Close up of the polyps of a Flowerpot coral (Goniopora sp.). Lembeh Strait, North Sulawesi, Indonesia.
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Juergen Freund / Close up of the polyps of a Flowerpot coral (Goniopora sp.). Lembeh Strait, North Sulawesi, Indonesia.
Colorful coral reef with soft corals (Alcyonacea) and fan corals (Gorgonacea). Misool, Raja Ampat, West Papua, Indonesia, January
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Juergen Freund / Colorful coral reef with soft corals (Alcyonacea) and fan corals (Gorgonacea). Misool, Raja Ampat, West Papua, Indonesia, January
Fluorescent coral viewed under normal light, Misool, Raja Ampat, West Papua, Indonesia, sequence 1/2
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Juergen Freund / Fluorescent coral viewed under normal light, Misool, Raja Ampat, West Papua, Indonesia, sequence 1/2
Fluorescent coral viewed under UV light, Misool, Raja Ampat, West Papua, Indonesia, sequence 2/2
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Juergen Freund / Fluorescent coral viewed under UV light, Misool, Raja Ampat, West Papua, Indonesia, sequence 2/2
Bleached coral {Acropora sp} caused by loss of algae with living purple polyps. Maldives.
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Georgette Douwma / Bleached coral {Acropora sp} caused by loss of algae with living purple polyps. Maldives.
Deepsea Gorgonian coral (Metallogorgia sp.) from mid atlantic ridge
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David Shale / Deepsea Gorgonian coral (Metallogorgia sp.) from mid atlantic ridge
Swarm of Common / Moon Jellyfish (Aurelia aurita)in sea loch, Isle of Mull, Scotland. June.  Digitally stitched panorama.
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Alex Hyde / Swarm of Common / Moon Jellyfish (Aurelia aurita)in sea loch, Isle of Mull, Scotland. June. Digitally stitched panorama.
Common / Moon Jellyfish (Aurelia aurita) close-up, breaking the water's surface, Isle of Mull, Scotland. June.
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Alex Hyde / Common / Moon Jellyfish (Aurelia aurita) close-up, breaking the water's surface, Isle of Mull, Scotland. June.
Swarm of Common / Moon Jellyfish (Aurelia aurita) in sea loch, Isle of Mull, Scotland. June.
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Alex Hyde / Swarm of Common / Moon Jellyfish (Aurelia aurita) in sea loch, Isle of Mull, Scotland. June.
Soft coral (Dendronephthya mucronata) on sandy seabed. Komodo National Park, Indonesia
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Georgette Douwma / Soft coral (Dendronephthya mucronata) on sandy seabed. Komodo National Park, Indonesia
Spiral wire coral (Cirrhipathes sp) Indonesia
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Georgette Douwma / Spiral wire coral (Cirrhipathes sp) Indonesia
Tree coral (Dendronephthya sp) on sandy sea bed. Rinca, Komodo National Park, Indonesia
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Georgette Douwma / Tree coral (Dendronephthya sp) on sandy sea bed. Rinca, Komodo National Park, Indonesia
Charlotte Watson snorkels down to collect sand which may contain polychaete worms, Coral Reef census, Lizard Island, Queensland, Australia, April 2008. Model released
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Juergen Freund / Charlotte Watson snorkels down to collect sand which may contain polychaete worms, Coral Reef census, Lizard Island, Queensland, Australia, April 2008. Model released
Lion's mane jellyfish (Cyanea capillata) Mull, Scotland, June 2009
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Wild Wonders of Europe / Sá / Lion's mane jellyfish (Cyanea capillata) Mull, Scotland, June 2009
Jellyfish, Mull, Scotland, June 2009
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Wild Wonders of Europe / Sá / Jellyfish, Mull, Scotland, June 2009
Lion's mane jellyfih (Cyanea capillata) with diver photographing it, Mull, Scotland, June 2009
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Wild Wonders of Europe / Sá / Lion's mane jellyfih (Cyanea capillata) with diver photographing it, Mull, Scotland, June 2009
Keys simnia (Neosimnia spelta) on a Yellow gorgonia (Eunicella cavolini) Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009
01267001
Wild Wonders of Europe / Banfi / Keys simnia (Neosimnia spelta) on a Yellow gorgonia (Eunicella cavolini) Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009
Golden cup coral (Astroides calycularis) Malta, Mediteranean, May 2009
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Wild Wonders of Europe / Zankl / Golden cup coral (Astroides calycularis) Malta, Mediteranean, May 2009
Star coral (Astroides calycularis) Malta, Mediteranean, May 2009
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Wild Wonders of Europe / Zankl / Star coral (Astroides calycularis) Malta, Mediteranean, May 2009
Blanket stars (Gorgonocephalus caputmedusae) climbing Fan coral (Paramuricea placomus) to position themselves in water current, Trondheimsfjorden, Norway, February 2009
01248664
Wild Wonders of Europe / Lundgren / Blanket stars (Gorgonocephalus caputmedusae) climbing Fan coral (Paramuricea placomus) to position themselves in water current, Trondheimsfjorden, Norway, February 2009
Juvenile schooling fish on coral reef, Indo-pacific
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Juergen Freund / Juvenile schooling fish on coral reef, Indo-pacific
Mast light of Japanese WWII ship, which has formed an artificial reef in the Marovo lagoon, Solomon Islands
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Michael Pitts / Mast light of Japanese WWII ship, which has formed an artificial reef in the Marovo lagoon, Solomon Islands
Coral spawning in the Great Barrier Reef happens every year in November  3 - 5 days after full moon,  Great Barrier Reef, Queensland, Australia
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Juergen Freund / Coral spawning in the Great Barrier Reef happens every year in November 3 - 5 days after full moon, Great Barrier Reef, Queensland, Australia
Irukandji box jellyfish (Carukia barnesi) catching and feeding on fish, north Australian
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Juergen Freund / Irukandji box jellyfish (Carukia barnesi) catching and feeding on fish, north Australian
Australian spotted jellyfish (Phyllorhiza punctata), Rowley Shoals, Western Australia
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Juergen Freund / Australian spotted jellyfish (Phyllorhiza punctata), Rowley Shoals, Western Australia
Irukandji box jellyfish (Carukia barnesi) with caught fish, north Australia
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Juergen Freund / Irukandji box jellyfish (Carukia barnesi) with caught fish, north Australia
Mastigias jellyfish {Mastigias sp.} massed at surface, Palau, Western Pacific Islands
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Michael Pitts / Mastigias jellyfish {Mastigias sp.} massed at surface, Palau, Western Pacific Islands
Diver amongst Mastigias jellyfish {Mastigias sp.}   Palau, Western Pacific Islands
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Michael Pitts / Diver amongst Mastigias jellyfish {Mastigias sp.} Palau, Western Pacific Islands
Coral reef scenic with waves and Anthias fish, Eygpt, Red Sea
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Georgette Douwma / Coral reef scenic with waves and Anthias fish, Eygpt, Red Sea
Coral reef scenic with waves and Anthias fish, Eygpt, Red Sea
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Georgette Douwma / Coral reef scenic with waves and Anthias fish, Eygpt, Red Sea
Fishing net caught on coral reef. Moluccas, Indonesia.
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Georgette Douwma / Fishing net caught on coral reef. Moluccas, Indonesia.
Coral reef table. Sharm-el-Sheik, Egypt, Red Sea
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Jeff Rotman / Coral reef table. Sharm-el-Sheik, Egypt, Red Sea
Coral reef in sandy lagoon. Ras Mohammed, Egypt, Red Sea.
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Jeff Rotman / Coral reef in sandy lagoon. Ras Mohammed, Egypt, Red Sea.
Box jellyfish {Chiropsalmus sp.} in fishtank on beach with palmtrees in background, Queensland, Australia
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Juergen Freund / Box jellyfish {Chiropsalmus sp.} in fishtank on beach with palmtrees in background, Queensland, Australia
Box jellyfish {Chironex sp.} in mangroves, split level, Australia
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Juergen Freund / Box jellyfish {Chironex sp.} in mangroves, split level, Australia
Jellyfish (Cephea cephea) Micronesia, Pacific Ocean
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Michael Pitts / Jellyfish (Cephea cephea) Micronesia, Pacific Ocean
Bleached {Acropora sp} coral caused by loss of algae due to temperature change. Maldives.
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Peter Scoones / Bleached {Acropora sp} coral caused by loss of algae due to temperature change. Maldives.
Mastigias jellyfish {Mastigias sp.} Palau, Western Pacific Islands
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Michael Pitts / Mastigias jellyfish {Mastigias sp.} Palau, Western Pacific Islands
Tube corals {Tubastrea faulkneri} with polyps open, Indo-Pacific
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Juergen Freund / Tube corals {Tubastrea faulkneri} with polyps open, Indo-Pacific
Palm tree octocoral {Clavularia sp} Layang layang atoll, Malaysia
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Doug Perrine / Palm tree octocoral {Clavularia sp} Layang layang atoll, Malaysia
Star coral {Montastrea annularis} releasing bundles of sperm and eggs, Florida, USA.
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Doug Perrine / Star coral {Montastrea annularis} releasing bundles of sperm and eggs, Florida, USA.
Red whip coral {Ellisella sp} Bahamas
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Doug Perrine / Red whip coral {Ellisella sp} Bahamas
Orange cup coral feeding {Tubastraea coccinea}
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Doug Perrine / Orange cup coral feeding {Tubastraea coccinea}
Giant brain coral provides shelter for Grunts and Squirrelfish, Florida Keys, USA.
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Doug Perrine / Giant brain coral provides shelter for Grunts and Squirrelfish, Florida Keys, USA.
Mushroom coral {Fungia fungites} Red Sea
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Jeff Rotman / Mushroom coral {Fungia fungites} Red Sea
Mastigias jellyfish {Mastigias sp.} Palau, Western Pacific Islands
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Michael Pitts / Mastigias jellyfish {Mastigias sp.} Palau, Western Pacific Islands
Papua jellyfish {Mastigias papua}, Indo-Pacific
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Juergen Freund / Papua jellyfish {Mastigias papua}, Indo-Pacific
Brain coral on coral reef Great Barrier Reef, Australia.
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Michael Pitts / Brain coral on coral reef Great Barrier Reef, Australia.
Papua jelly fish with fish near tentacles, Palau, Pacific Ocean
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Michael Pitts / Papua jelly fish with fish near tentacles, Palau, Pacific Ocean
Table top coral {Acropora hyacithus} Sulawesi, Indonesia
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Solvin Zankl / Table top coral {Acropora hyacithus} Sulawesi, Indonesia
Red coral with polyps extended {Corallium rubrum} Balearic Is, Mediterranean
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Georgette Douwma / Red coral with polyps extended {Corallium rubrum} Balearic Is, Mediterranean
Coral {Stylophora pistillata} Red Sea
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Francis Abbott / Coral {Stylophora pistillata} Red Sea
Jellyfish in open sea with fish protected in tentacles. Palau, Pacific.
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Michael Pitts / Jellyfish in open sea with fish protected in tentacles. Palau, Pacific.
Jellyfish {Mastigias sp} in Jellyfish lake Palau Micronesi
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Michael Pitts / Jellyfish {Mastigias sp} in Jellyfish lake Palau Micronesi