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Dugong (Dugong dugon) male and juvenile Golden trevally (Gnathanodon speciosus) swimming over Seagrass (Halophila stipulacea) meadow. Marsa Nabaa, Marsa Alam, Egypt.
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Alex Mustard / Dugong (Dugong dugon) male and juvenile Golden trevally (Gnathanodon speciosus) swimming over Seagrass (Halophila stipulacea) meadow. Marsa Nabaa, Marsa Alam, Egypt.
Three Pink anemonefish (Amphiprion perideraion) living in a purple skirted magnificent sea anemone (Heteractis magnifica) on a coral reef, below a small island. Misool, Raja Ampat, West Papua, Indones...
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Alex Mustard / Three Pink anemonefish (Amphiprion perideraion) living in a purple skirted magnificent sea anemone (Heteractis magnifica) on a coral reef, below a small island. Misool, Raja Ampat, West Papua, Indones...
Reef lizardifsh (Synodus variegatus) at a cleaning station, being cleaned by Holthuis anemone shrimps (Ancylomenes holthuisi). Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
01628745
Alex Mustard / Reef lizardifsh (Synodus variegatus) at a cleaning station, being cleaned by Holthuis anemone shrimps (Ancylomenes holthuisi). Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
Boxer Crab (Lybia tessellata) with sea anemones in its claws for defense. Lembeh Strait, North Sulawesi, Indonesia.
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Georgette Douwma / Boxer Crab (Lybia tessellata) with sea anemones in its claws for defense. Lembeh Strait, North Sulawesi, Indonesia.
Clownfish (Amphiprion sp) in anemone home, Philippines.
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Denis-Huot / Clownfish (Amphiprion sp) in anemone home, Philippines.
Clark's anemonefish (Amphiprion clarkii), pair tending to egg mass placed beside the protection of an anemone. Yap, Micronesia.
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David Fleetham / Clark's anemonefish (Amphiprion clarkii), pair tending to egg mass placed beside the protection of an anemone. Yap, Micronesia.
Northern Giraffe (Giraffa camelopardalis) with Red-billed Oxpeckers (Buphagus erythrorhynchus) feeding on parasites in symbiotic relationship, Mkhuze Game Reserve, KwaZulu-Natal, South Africa
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Richard Du Toit / Northern Giraffe (Giraffa camelopardalis) with Red-billed Oxpeckers (Buphagus erythrorhynchus) feeding on parasites in symbiotic relationship, Mkhuze Game Reserve, KwaZulu-Natal, South Africa
Red-billed oxpecker (Buphagus erythrorhynchus) feeding on Impala (Aepyceros melampus), Savuti, Botswana.
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Guy Edwardes / Red-billed oxpecker (Buphagus erythrorhynchus) feeding on Impala (Aepyceros melampus), Savuti, Botswana.
Red Sea anemonefish (Amphiprion bicinctus) in their home, a Sea anemone (Heteractis magnifica), on a coral reef. Big Brother island, Red Sea. Egypt.
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Jordi Chias / Red Sea anemonefish (Amphiprion bicinctus) in their home, a Sea anemone (Heteractis magnifica), on a coral reef. Big Brother island, Red Sea. Egypt.
Three False clownfish (Amphiprion ocellaris) in Sea anemone (Heteractis magnifica) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.
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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.
Impala (Aepyceros melampus) with redbilled oxpecker (Buphagus erythrorhynchus), Kruger National Park, South Africa.
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Ann & Steve Toon / Impala (Aepyceros melampus) with redbilled oxpecker (Buphagus erythrorhynchus), Kruger National Park, South Africa.
Anemone hermit crab (Pagurus prideaux) getting into a shell, with a Cloak anemone (Adamsia palliata), Sark, British Channel Islands, UK, June.
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Sue Daly / Anemone hermit crab (Pagurus prideaux) getting into a shell, with a Cloak anemone (Adamsia palliata), Sark, British Channel Islands, UK, June.
Yellow-billed oxpecker (Buphagus africanus) perched on the back of an African buffalo (Syncerus caffer) on the banks of the Chobe River, Chobe National Park, Botswana.
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Neil Aldridge / Yellow-billed oxpecker (Buphagus africanus) perched on the back of an African buffalo (Syncerus caffer) on the banks of the Chobe River, Chobe National Park, Botswana.
Warthog (Phacochoerus africanus) with a Yellow-billed oxpecker (Buphagus africanus) on its back, nuzzling its mother at a waterhole, Chief's Island, Okavango Delta, Botswana.
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Neil Aldridge / Warthog (Phacochoerus africanus) with a Yellow-billed oxpecker (Buphagus africanus) on its back, nuzzling its mother at a waterhole, Chief's Island, Okavango Delta, Botswana.
Western clownfish (Amphiprion oceallaris) in a Magnificent sea anemone (Heteractis magnifica). Yillet Kecil, MIsool, Raja Ampat, West Papua, Indonesia. Ceram Sea
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Alex Mustard / Western clownfish (Amphiprion oceallaris) in a Magnificent sea anemone (Heteractis magnifica). Yillet Kecil, MIsool, Raja Ampat, West Papua, Indonesia. Ceram Sea
Maldivian anemonefish (Amphiprion nigripes) shelters against a closed magnificent sea anemone (Heteractis magnifica). Male Atoll, Maldives. Indian Ocean.
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Alex Mustard / Maldivian anemonefish (Amphiprion nigripes) shelters against a closed magnificent sea anemone (Heteractis magnifica). Male Atoll, Maldives. Indian Ocean.
Red and black anemonefish (Amphiprion melanopus) in a Bulb tentacle sea anemone (Entacmaea quadricolor). Kri Island, Raja Ampat, West Papua, Indonesia, South East Asia. Dampier Strait, Tropical West P...
01534332
Alex Mustard / Red and black anemonefish (Amphiprion melanopus) in a Bulb tentacle sea anemone (Entacmaea quadricolor). Kri Island, Raja Ampat, West Papua, Indonesia, South East Asia. Dampier Strait, Tropical West P...
Maldive anemonefish (Amphiprion nigripes) shoal swimming in the current flowing over a Magnificent sea anemone (Heteractis magnifica). Baa Atoll, Maldives. Indian Ocean.
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Alex Mustard / Maldive anemonefish (Amphiprion nigripes) shoal swimming in the current flowing over a Magnificent sea anemone (Heteractis magnifica). Baa Atoll, Maldives. Indian Ocean.
RF- Western clownfish (Amphiprion oceallaris) in Magnificent sea anemone (Heteractis magnifica). Raja Ampat, West Papua, Indonesia. (This image may be licensed either as rights managed or royalty free...
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Alex Mustard / RF- Western clownfish (Amphiprion oceallaris) in Magnificent sea anemone (Heteractis magnifica). Raja Ampat, West Papua, Indonesia. (This image may be licensed either as rights managed or royalty free...
Giant Manta (Manta birostris) with Remoras (Remora brachyptera) attached to both wings, offshore Santa Maria Island, Azores, Atlantic Ocean
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Jordi Chias / Giant Manta (Manta birostris) with Remoras (Remora brachyptera) attached to both wings, offshore Santa Maria Island, Azores, Atlantic Ocean
Red-billed oxpeckers (Buphagus erythrorhynchus) adult and young on the back of Common warthog (Phacochoerus africanus) through grassland in summer Mapungubwe National Park, South Africa.
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Neil Aldridge / Red-billed oxpeckers (Buphagus erythrorhynchus) adult and young on the back of Common warthog (Phacochoerus africanus) through grassland in summer Mapungubwe National Park, South Africa.
Portrait of False clown anemonefish (Amphiprion ocellaris) Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.
01520091
Alex Mustard / Portrait of False clown anemonefish (Amphiprion ocellaris) Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.
Saddleback anemonefish (Amphiprion polymnus) in anemone home, Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.
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Alex Mustard / Saddleback anemonefish (Amphiprion polymnus) in anemone home, Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.
Greater kudu (Tregalaphus strepsiceros) covered in Yellowbilled oxpeckers (Buphagus africanus) rear view, Kruger National Park, South Africa.
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Richard Du Toit / Greater kudu (Tregalaphus strepsiceros) covered in Yellowbilled oxpeckers (Buphagus africanus) rear view, Kruger National Park, South Africa.
Yellow-billed oxpecker (Buphagus africanus) on African buffalo (Syncerus caffer), Masai Mara, Kenya
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Pal Hermansen / Yellow-billed oxpecker (Buphagus africanus) on African buffalo (Syncerus caffer), Masai Mara, Kenya
Green turtle (Chelonia mydas) with two large remoras (Echeneis naucrates) attached to its carapace, at rest on artificial reef.  Mabul, Malaysia.
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Georgette Douwma / Green turtle (Chelonia mydas) with two large remoras (Echeneis naucrates) attached to its carapace, at rest on artificial reef. Mabul, Malaysia.
Marsh deer (Blastocerus dichotomus) male with Cattle tyrant  (Machetornis rixosus) on back, Ibera Marshes, Corrientes Province, Argentina.
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Gabriel Rojo / Marsh deer (Blastocerus dichotomus) male with Cattle tyrant (Machetornis rixosus) on back, Ibera Marshes, Corrientes Province, Argentina.
Yellow stripe clingfish (Diademichthys lineatus) living in association with the Fire Urchin (Astropyga radiata) Lembeh Strait, North Sulawesi, Indonesia.
01498574
Constantinos Petrinos / Yellow stripe clingfish (Diademichthys lineatus) living in association with the Fire Urchin (Astropyga radiata) Lembeh Strait, North Sulawesi, Indonesia.
Peacock-tail anemone shrimp (Periclimenes brevicarpalis) living commensally with the Branching Sea Anemone (Actinodendron glomeratum). Lembeh Strait, North Sulawesi, Indonesia.
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Constantinos Petrinos / Peacock-tail anemone shrimp (Periclimenes brevicarpalis) living commensally with the Branching Sea Anemone (Actinodendron glomeratum). Lembeh Strait, North Sulawesi, Indonesia.
Northern sea nettle (Chrysaora Melanaster)  floating, with Mackerel fry ( Carangidae) Izu, Japan. January.
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Aflo / Northern sea nettle (Chrysaora Melanaster) floating, with Mackerel fry ( Carangidae) Izu, Japan. January.
Giant manta ray (Manta birostris) swimming over a cleaning station, Maldives, Indian Ocean.
01443859
Michael Pitts / Giant manta ray (Manta birostris) swimming over a cleaning station, Maldives, Indian Ocean.
Pink anemonefish (Amphiprion perideraion) looks out from its host Magnificent sea anemone (Heteractis magnifica) Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocea...
01473189
Alex Mustard / Pink anemonefish (Amphiprion perideraion) looks out from its host Magnificent sea anemone (Heteractis magnifica) Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocea...
RF- Pair of Red Sea anemonefish (Amphiprion bicinctus) in Magnificent sea anemone (Heteractis magnifica), which has closed up in the late afternoon revealing its red skirt. St Johns Reef. Egypt. Red S...
01472365
Alex Mustard / RF- Pair of Red Sea anemonefish (Amphiprion bicinctus) in Magnificent sea anemone (Heteractis magnifica), which has closed up in the late afternoon revealing its red skirt. St Johns Reef. Egypt. Red S...
Red Sea anemonefish (Amphiprion bicinctus) in Magnificent sea anemone (Heteractis magnifica), which has closed up in the late afternoon, on coral reef under stormy seas. St Johns Reef. Egypt. Red Sea.
01472360
Alex Mustard / Red Sea anemonefish (Amphiprion bicinctus) in Magnificent sea anemone (Heteractis magnifica), which has closed up in the late afternoon, on coral reef under stormy seas. St Johns Reef. Egypt. Red Sea.
Red Sea anemonefish (Amphiprion bicinctus) in front of magnificent sea anemone. Anemone City, Ras Mohammed Marine Park, Sinai, Egypt. Gulf of Aqaba, Red Sea.
01472320
Alex Mustard / Red Sea anemonefish (Amphiprion bicinctus) in front of magnificent sea anemone. Anemone City, Ras Mohammed Marine Park, Sinai, Egypt. Gulf of Aqaba, Red Sea.
Giant Manta Ray (Manta birostris) at cleaning station with Clarion Angelfish (Holacanthus clarionensis) San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (The Socorro Islands), Pacific...
01474720
Claudio Contreras / Giant Manta Ray (Manta birostris) at cleaning station with Clarion Angelfish (Holacanthus clarionensis) San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (The Socorro Islands), Pacific...
Symbiotic emperor shrimp (Periclimenes imperator / Zenopontonia rex) living in the gills of a spanish nudibranch (Hexabranchus sanguineus) Red Sea, Egypt
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Jeff Rotman / Symbiotic emperor shrimp (Periclimenes imperator / Zenopontonia rex) living in the gills of a spanish nudibranch (Hexabranchus sanguineus) Red Sea, Egypt
Forest of scots pine after heavy snowfall, Cairngorms National Park, Scotland, March 2012. Did you know? Like many orchids, Scots pine trees have a symbiotic relationship with fungi - while the tree p...
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Peter Cairns / 2020VISION / Forest of scots pine after heavy snowfall, Cairngorms National Park, Scotland, March 2012. Did you know? Like many orchids, Scots pine trees have a symbiotic relationship with fungi - while the tree p...
RF- Green sea turtle (Chelonia mydas) being cleaned by herbivorous cleaner fish species Yellow tangs (Zebrasoma flavescens) and Gold-ring surgeonfish (Ctenochaetus strigosus) that graze algae on turtl...
01181162
Doug Perrine / RF- Green sea turtle (Chelonia mydas) being cleaned by herbivorous cleaner fish species Yellow tangs (Zebrasoma flavescens) and Gold-ring surgeonfish (Ctenochaetus strigosus) that graze algae on turtl...
Broad bean (Vicia faba) roots with root nodules formed by Bacteria (Rhizobium sp) for nitrogen fixation.
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Nigel Cattlin / Broad bean (Vicia faba) roots with root nodules formed by Bacteria (Rhizobium sp) for nitrogen fixation.
Warthog (Phacochoerus africanus) with Redbilled oxpecker (Buphagus erythrorhynchus), Zimanga game reserve, KwaZulu-Natal, South Africa.
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Ann & Steve Toon / Warthog (Phacochoerus africanus) with Redbilled oxpecker (Buphagus erythrorhynchus), Zimanga game reserve, KwaZulu-Natal, South Africa.
Warthog (Phacochoerus africanus) drinking, with redbilled oxpeckers (Buphagus erythrorhynchus), Zimanga game reserve, KwaZulu-Natal, South Africa.
01633054
Ann & Steve Toon / Warthog (Phacochoerus africanus) drinking, with redbilled oxpeckers (Buphagus erythrorhynchus), Zimanga game reserve, KwaZulu-Natal, South Africa.
Warthog (Phacochoerus africanus) drinking, with redbilled oxpecker (Buphagus erythrorhynchus), Zimanga game reserve, KwaZulu-Natal, South Africa.
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Ann & Steve Toon / Warthog (Phacochoerus africanus) drinking, with redbilled oxpecker (Buphagus erythrorhynchus), Zimanga game reserve, KwaZulu-Natal, South Africa.
Bluestreak cleaner wrasse (Labroides dimidiatus) cleans among the sharp teeth of a predatory roving coral grouper (Plectropomus pessuliferus) beneath an overhang on a coral reef. Ras Mohammed National...
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Alex Mustard / Bluestreak cleaner wrasse (Labroides dimidiatus) cleans among the sharp teeth of a predatory roving coral grouper (Plectropomus pessuliferus) beneath an overhang on a coral reef. Ras Mohammed National...
Sleepy sponge crab (Dromia dormia) climbing over a rock, carrying its sea squirt (Didemnum molle) disguise, with brittlestar. Anilao, Batangas marine protected area, Luzon, Philippines. Verde Island P...
01634747
Alex Mustard / Sleepy sponge crab (Dromia dormia) climbing over a rock, carrying its sea squirt (Didemnum molle) disguise, with brittlestar. Anilao, Batangas marine protected area, Luzon, Philippines. Verde Island P...
Reef manta (Mobula alfredi) visiting a cleaning station on a coral reef with a school of Onespot snappers (Lutjanus monostigma), Oriental sweetlips (Plectorhinchus vittatus) and Sabre squirrelfish (Sa...
01634733
Alex Mustard / Reef manta (Mobula alfredi) visiting a cleaning station on a coral reef with a school of Onespot snappers (Lutjanus monostigma), Oriental sweetlips (Plectorhinchus vittatus) and Sabre squirrelfish (Sa...
Western clown anemonefish (Amphiprion ocellaris) poses with a large, dominant female behind. The clownfish in the foreground is probably a juvenile. Bitung, North Sulawesi, Indonesia. Lembeh Strait, M...
01634723
Alex Mustard / Western clown anemonefish (Amphiprion ocellaris) poses with a large, dominant female behind. The clownfish in the foreground is probably a juvenile. Bitung, North Sulawesi, Indonesia. Lembeh Strait, M...
RF - Pygmy lemon gobies (Lubricogobius exiguus) make their home in an old heart urchin (Maretia sp.) Dauin, Philippines.
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Alex Mustard / RF - Pygmy lemon gobies (Lubricogobius exiguus) make their home in an old heart urchin (Maretia sp.) Dauin, Philippines.
Ocean sunfish (Mola mola) and Pilot fish (Naucrates sp). Tenerife, Canary Islands.
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Sergio Hanquet / Ocean sunfish (Mola mola) and Pilot fish (Naucrates sp). Tenerife, Canary Islands.
Ocean sunfish (Mola mola) and Pilot fish (Naucrates sp). Tenerife, Canary Islands.
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Sergio Hanquet / Ocean sunfish (Mola mola) and Pilot fish (Naucrates sp). Tenerife, Canary Islands.
Ocean sunfich (Mola mola) at sea with pilot fish. Sp: Pez Luna, Pejeluna - fr: Poisson lune.
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Sergio Hanquet / Ocean sunfich (Mola mola) at sea with pilot fish. Sp: Pez Luna, Pejeluna - fr: Poisson lune.
Brooks urchin shrimp (Allopontonia brooki), commensal among the venomous spines of Variable sea urchin (Asthenosoma varium). On sea floor, Komodo, Indonesia.
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David Hall / Brooks urchin shrimp (Allopontonia brooki), commensal among the venomous spines of Variable sea urchin (Asthenosoma varium). On sea floor, Komodo, Indonesia.
Mozambique ghostgoby (Pleurosicya mossambica) living commensally with Sea pen (Pennatulacea). Komodo, Indonesia; November, 2006
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David Hall / Mozambique ghostgoby (Pleurosicya mossambica) living commensally with Sea pen (Pennatulacea). Komodo, Indonesia; November, 2006
Yellow prawn-goby (Cryptocentrus cinctus) and Snapping shrimp (Alpheus sp). Mutualistic symbiosis with goby as watchdog and shrimp maintaining burrow. Komodo, Indonesia.
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David Hall / Yellow prawn-goby (Cryptocentrus cinctus) and Snapping shrimp (Alpheus sp). Mutualistic symbiosis with goby as watchdog and shrimp maintaining burrow. Komodo, Indonesia.
Arcfin shrimpgoby (Amblyeleotris arcupinna) and Snapping shrimp (Alpheus sp), blind shrimp maintaining contact with goby via antenna. Mutualism with shrimp maintaining burrow and goby acting as lookou...
01630282
David Hall / Arcfin shrimpgoby (Amblyeleotris arcupinna) and Snapping shrimp (Alpheus sp), blind shrimp maintaining contact with goby via antenna. Mutualism with shrimp maintaining burrow and goby acting as lookou...
Anemone hermit crab (Dardanus pedunculatus) carrying Anemones (Calliactis polypus) on shell. Mutualism in which anemones are transported to new feeding opportunities whilst providing camouflage and de...
01630280
David Hall / Anemone hermit crab (Dardanus pedunculatus) carrying Anemones (Calliactis polypus) on shell. Mutualism in which anemones are transported to new feeding opportunities whilst providing camouflage and de...
Decorator crab (Majidae) covered with hydroid polyps, providing camouflage and defensive sting. On Soft coral (Alcyonacea). Pantar, Alor Archipelago, Indonesia; November, 2006
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David Hall / Decorator crab (Majidae) covered with hydroid polyps, providing camouflage and defensive sting. On Soft coral (Alcyonacea). Pantar, Alor Archipelago, Indonesia; November, 2006
Pink clownfish (Amphiprion perideraion), four swimming over Magnificent anemone (Heteractis magnifica). Komodo, Indonesia.
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David Hall / Pink clownfish (Amphiprion perideraion), four swimming over Magnificent anemone (Heteractis magnifica). Komodo, Indonesia.
Pink clownfish / anemonefish (Amphiprion perideraion) swimming over Magnificent anemone (Heteractis magnifica). Komodo, Indonesia.
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David Hall / Pink clownfish / anemonefish (Amphiprion perideraion) swimming over Magnificent anemone (Heteractis magnifica). Komodo, Indonesia.
Loggerhead sea turtle (Caretta caretta) with two Remora fish (Echeneididae) above sea floor. Bahamas.
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Shane Gross / Loggerhead sea turtle (Caretta caretta) with two Remora fish (Echeneididae) above sea floor. Bahamas.
Cape buffalo (Syncerus caffer caffer) portrait, Red-billed oxpeckers (Buphagus erythrorhynchus) removing parasites. Nakuru, Kenya.
01630605
Melvin Grey / Cape buffalo (Syncerus caffer caffer) portrait, Red-billed oxpeckers (Buphagus erythrorhynchus) removing parasites. Nakuru, Kenya.
Bluestreak cleaner wrasse (Labroides dimidiatus) cleaning Luna lionfish (Pterois lunulata). Shizuoka Prefecture, Honshu, Japan. June.
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Tony Wu / Bluestreak cleaner wrasse (Labroides dimidiatus) cleaning Luna lionfish (Pterois lunulata). Shizuoka Prefecture, Honshu, Japan. June.
Boxer crab (Lybia tessellata) carrying a sea anemone around in each of its claws, Xiaoliuqiu Island, Taiwan
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Magnus Lundgren / Wild Wonders of China / Boxer crab (Lybia tessellata) carrying a sea anemone around in each of its claws, Xiaoliuqiu Island, Taiwan
Humpback whale (Megaptera novaeangliae) calf with Remora fish (Echeneidae) on underside. Vava'u, Kingdom of Tonga, South Pacific.
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Doug Perrine / Humpback whale (Megaptera novaeangliae) calf with Remora fish (Echeneidae) on underside. Vava'u, Kingdom of Tonga, South Pacific.
Black grouper (Mycteroperca bonaci) with Remora fish (Remora sp). Caribbean Sea off Gardens of the Queen National Park, Cuba.
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Shane Gross / Black grouper (Mycteroperca bonaci) with Remora fish (Remora sp). Caribbean Sea off Gardens of the Queen National Park, Cuba.
White stripe urchin shrimp (Stegopontonia commensalis) among the spines of its host sea urchin. Commensal shrimp. Xiaoliuqiu Island, Taiwan
01627109
Magnus Lundgren / Wild Wonders of China / White stripe urchin shrimp (Stegopontonia commensalis) among the spines of its host sea urchin. Commensal shrimp. Xiaoliuqiu Island, Taiwan
Common Warthog (Phacochoerus africanus), with a Red-billed Oxpecker (Buphagus erythrorhynchus) eating its ticks and other parasites, Zimanga Private Nature Reserve, KwaZulu Natal, South Africa
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Staffan Widstrand / Common Warthog (Phacochoerus africanus), with a Red-billed Oxpecker (Buphagus erythrorhynchus) eating its ticks and other parasites, Zimanga Private Nature Reserve, KwaZulu Natal, South Africa
Common Warthog (Phacochoerus africanus), with a Red-billed Oxpecker (Buphagus erythrorhynchus) eating its ticks and other parasites, Zimanga Private Nature Reserve, KwaZulu Natal, South Africa
01626380
Staffan Widstrand / Common Warthog (Phacochoerus africanus), with a Red-billed Oxpecker (Buphagus erythrorhynchus) eating its ticks and other parasites, Zimanga Private Nature Reserve, KwaZulu Natal, South Africa
African buffalo / Cape buffalo (Syncerus caffer) drinking Zimanga Private Nature Reserve, KwaZulu Natal, South Africa
01626350
Staffan Widstrand / African buffalo / Cape buffalo (Syncerus caffer) drinking Zimanga Private Nature Reserve, KwaZulu Natal, South Africa
Elegant crinoid squat lobster (Allogalathea elegans) living in a crinoid / feather star. Sulu sea, Philippines
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Pascal Kobeh / Elegant crinoid squat lobster (Allogalathea elegans) living in a crinoid / feather star. Sulu sea, Philippines
Red Deer (Cervus elaphus) stag and Western jackdaw (Corvus monedula) picking ticks from its ear. Richmond Park, London, UK. September. Cropped
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Oscar Dewhurst / Red Deer (Cervus elaphus) stag and Western jackdaw (Corvus monedula) picking ticks from its ear. Richmond Park, London, UK. September. Cropped
Ants with symbiotic relationship with Mahang bitik (Macaranga maingaiyi), Sabangau (peat-swamp) Forest, Kalimantan, Indonesia.Ants live inside its hollow stem. In return, these ants kill and eat other...
01630898
Duncan Murrell / Ants with symbiotic relationship with Mahang bitik (Macaranga maingaiyi), Sabangau (peat-swamp) Forest, Kalimantan, Indonesia.Ants live inside its hollow stem. In return, these ants kill and eat other...
Solar-powered phyllodesmium (Phyllodesmium longicirrum) this species has evolved a symbiotic relationship with zooxanthellae. Lembeh Strait, North Sulawesi, Indonesia.
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Georgette Douwma / Solar-powered phyllodesmium (Phyllodesmium longicirrum) this species has evolved a symbiotic relationship with zooxanthellae. Lembeh Strait, North Sulawesi, Indonesia.
Black rhinoceros (Diceros bicornis) walks across the open plains, Okavango Delta, Botswana while egrets follow to catch insects flushed from the grass. This rhino was released in the Okavango Delta as...
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Neil Aldridge / Black rhinoceros (Diceros bicornis) walks across the open plains, Okavango Delta, Botswana while egrets follow to catch insects flushed from the grass. This rhino was released in the Okavango Delta as...
Two Black rhinoceros (Diceros bicornis) feed on bushes in Okavango Delta, Botswana, while Yellowbilled oxpeckers (Buphagus africanus) feeding on parasites on their skins. These rhinos were released in...
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Neil Aldridge / Two Black rhinoceros (Diceros bicornis) feed on bushes in Okavango Delta, Botswana, while Yellowbilled oxpeckers (Buphagus africanus) feeding on parasites on their skins. These rhinos were released in...
Coral hermit crab (Dardanus pedunculatus) with sea anemones on its shell - the anemones get better feeding opportunities from extra mobility, the crab gains extra protection. Sulu Sea, Philippines.
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Pascal Kobeh / Coral hermit crab (Dardanus pedunculatus) with sea anemones on its shell - the anemones get better feeding opportunities from extra mobility, the crab gains extra protection. Sulu Sea, Philippines.
Coral hermit crab (Dardanus pedunculatus) with sea anemones on its shell - the anemones get better feeding opportunities from extra mobility, the crab gains extra protection. Sulu Sea, Philippines. Me...
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Pascal Kobeh / Coral hermit crab (Dardanus pedunculatus) with sea anemones on its shell - the anemones get better feeding opportunities from extra mobility, the crab gains extra protection. Sulu Sea, Philippines. Me...
Clownfish (Amphiprion sp) in anemone home, Philippines.
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Denis-Huot / Clownfish (Amphiprion sp) in anemone home, Philippines.
Clownfish (Amphiprion sp) in anemone home, Philippines.
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Denis-Huot / Clownfish (Amphiprion sp) in anemone home, Philippines.
Impala (Aepyceros melampus), and Yellow-billed oxpeckers (Buphagus africanus) Masai-Mara game Reserve, Kenya.
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Denis-Huot / Impala (Aepyceros melampus), and Yellow-billed oxpeckers (Buphagus africanus) Masai-Mara game Reserve, Kenya.
Wild water buffalo (Bubalus arnee) male with Jungle myna (Acridotheres fusses) on its back. Kaziranga National Park, Assam, India.
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Patricio Robles Gil / Wild water buffalo (Bubalus arnee) male with Jungle myna (Acridotheres fusses) on its back. Kaziranga National Park, Assam, India.
Wild water buffalo (Bubalus arnee) male with Jungle myna (Acridotheres fusses) on its back. Kaziranga National Park, Assam, India.
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Patricio Robles Gil / Wild water buffalo (Bubalus arnee) male with Jungle myna (Acridotheres fusses) on its back. Kaziranga National Park, Assam, India.
Roan antelope (Hippotragus equinus) running with oxpeckers (Buphagus sp.) on back, Busanga plains, Kafue National Park, Zambia. August.
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Kristel Richard / Roan antelope (Hippotragus equinus) running with oxpeckers (Buphagus sp.) on back, Busanga plains, Kafue National Park, Zambia. August.
Small ground finch (Geospiza fuliginosa) feeding on ectoparasites found on Marine iguana (Amblyrhynchus cristatus). Isabela Island, Galapagos.
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Nick Hawkins / Small ground finch (Geospiza fuliginosa) feeding on ectoparasites found on Marine iguana (Amblyrhynchus cristatus). Isabela Island, Galapagos.
Galapagos lava lizard (Microlophus albemarlensis) feeding on flies attracted to sunbathing Marine iguana (Amblyrhynchus cristatus). Isabela Island, Galapagos.
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Nick Hawkins / Galapagos lava lizard (Microlophus albemarlensis) feeding on flies attracted to sunbathing Marine iguana (Amblyrhynchus cristatus). Isabela Island, Galapagos.
Small ground finch (Geospiza fuliginosa) standing on Marine iguana (Amblyrhynchus cristatus) leg. Finches feed on ectoparasites on iguanas. Isabela Island, Galapagos.
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Nick Hawkins / Small ground finch (Geospiza fuliginosa) standing on Marine iguana (Amblyrhynchus cristatus) leg. Finches feed on ectoparasites on iguanas. Isabela Island, Galapagos.
Small ground finch (Geospiza fuliginosa) feeding on ectoparasites on Marine iguana (Amblyrhynchus cristatus) leg. Isabela Island, Galapagos.
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Nick Hawkins / Small ground finch (Geospiza fuliginosa) feeding on ectoparasites on Marine iguana (Amblyrhynchus cristatus) leg. Isabela Island, Galapagos.
Small ground finch (Geospiza fuliginosa) feeding on ectoparasites whilst standing on Marine iguana (Amblyrhynchus cristatus) leg. Isabela Island, Galapagos.
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Nick Hawkins / Small ground finch (Geospiza fuliginosa) feeding on ectoparasites whilst standing on Marine iguana (Amblyrhynchus cristatus) leg. Isabela Island, Galapagos.
Small ground finch (Geospiza fuliginosa) standing on Marine iguana (Amblyrhynchus cristatus) leg. The finches feed on ectoparasites on iguanas. Isabela Island, Galapagos.
01616810
Nick Hawkins / Small ground finch (Geospiza fuliginosa) standing on Marine iguana (Amblyrhynchus cristatus) leg. The finches feed on ectoparasites on iguanas. Isabela Island, Galapagos.
Galapagos lava lizard (Microlophus albemarlensis) resting on tail of Marine iguana (Amblyrhynchus cristatus). Lava lizards feed on flies found on iguanas. Isabela Island, Galapagos.
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Nick Hawkins / Galapagos lava lizard (Microlophus albemarlensis) resting on tail of Marine iguana (Amblyrhynchus cristatus). Lava lizards feed on flies found on iguanas. Isabela Island, Galapagos.
Redbilled oxpecker (Buphagus erythrorhynchus) on Impala (Aepyceros melampus), iMfolozi game reserve, KwaZulu-Natal, South Africa, September
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Ann & Steve Toon / Redbilled oxpecker (Buphagus erythrorhynchus) on Impala (Aepyceros melampus), iMfolozi game reserve, KwaZulu-Natal, South Africa, September
Redbilled oxpecker (Buphagus erythrorhynchus) on Impala (Aepyceros melampus), iMfolozi game reserve, KwaZulu-Natal, South Africa, September
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Ann & Steve Toon / Redbilled oxpecker (Buphagus erythrorhynchus) on Impala (Aepyceros melampus), iMfolozi game reserve, KwaZulu-Natal, South Africa, September
Western cattle egret (Bubulcus ibis) foraging for insects on Maraichine cow, Marais Breton, Vendee, France, August.
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Loic Poidevin / Western cattle egret (Bubulcus ibis) foraging for insects on Maraichine cow, Marais Breton, Vendee, France, August.
Western cattle egret (Bubulcus ibis) foraging for insects on Maraichine cow, Marais Breton, Vendee, France, August.
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Loic Poidevin / Western cattle egret (Bubulcus ibis) foraging for insects on Maraichine cow, Marais Breton, Vendee, France, August.
Western cattle egret (Bubulcus ibis) foraging for insects on Maraichine cow, Marais Breton, Vendee, France, August.
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Loic Poidevin / Western cattle egret (Bubulcus ibis) foraging for insects on Maraichine cow, Marais Breton, Vendee, France, August.
Sarasvati anemone shrimp (Ancylomenes sarasvati) and a False clown anemonefish (Amphiprion ocellaris) on a Magnificent sea anemone (Heteractis magnifica). North Sulawesi, Indonesia.
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Georgette Douwma / Sarasvati anemone shrimp (Ancylomenes sarasvati) and a False clown anemonefish (Amphiprion ocellaris) on a Magnificent sea anemone (Heteractis magnifica). North Sulawesi, Indonesia.