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Nudibranch (Chromodoris willani) with a scale worm. Lembeh Strait, North Sulawesi, Indonesia.
01618364
Georgette Douwma / Nudibranch (Chromodoris willani) with a scale worm. Lembeh Strait, North Sulawesi, Indonesia.
Nudibranchs (Doto greenamyeri) newly described species on feather hydroids. Seraya Bay, north coast of Bali, Indonesia. Java Sea.
01536855
Alex Mustard / Nudibranchs (Doto greenamyeri) newly described species on feather hydroids. Seraya Bay, north coast of Bali, Indonesia. Java Sea.
Portrait of a Nudibranch (Flabellina pellucida) on a kelp frond with star trails. Gulen, Norway. North East Atlantic Ocean.
01536804
Alex Mustard / Portrait of a Nudibranch (Flabellina pellucida) on a kelp frond with star trails. Gulen, Norway. North East Atlantic Ocean.
Nudibranch (Flabellina lineata) in aquarium, taken in the field in Gulen, Norway. North East Atlantic Ocean. Collected for scientific research.
01520089
Alex Mustard / Nudibranch (Flabellina lineata) in aquarium, taken in the field in Gulen, Norway. North East Atlantic Ocean. Collected for scientific research.
Nudibranch (Nembrotha cristata) climbing on a Tunicate (Polycarpa aurata) at night. This species of seaslug feeds on seasquirts. A tiny cyclopoid copepod swimming past. Yillet Yecil, Yillet Islands, M...
01520123
Alex Mustard / Nudibranch (Nembrotha cristata) climbing on a Tunicate (Polycarpa aurata) at night. This species of seaslug feeds on seasquirts. A tiny cyclopoid copepod swimming past. Yillet Yecil, Yillet Islands, M...
Chromodorid nudibranch (Chromodoris annae) on Sea Squirt (Polycarpa aurata) Lembeh Strait, North Sulawesi, Indonesia.
01498810
Constantinos Petrinos / Chromodorid nudibranch (Chromodoris annae) on Sea Squirt (Polycarpa aurata) Lembeh Strait, North Sulawesi, Indonesia.
Emperor shrimp (Periclimenes imperator / Zenopontonia rex) hitchhiking on large t-bar nudibranch (Ceratosoma trilobatum) The shrimp gains food source and protection on the toxic seaslug. Bitung, North...
01473175
Alex Mustard / Emperor shrimp (Periclimenes imperator / Zenopontonia rex) hitchhiking on large t-bar nudibranch (Ceratosoma trilobatum) The shrimp gains food source and protection on the toxic seaslug. Bitung, North...
Nudibranch (Cratena peregrina) on a sponge, Ist Island, Croatia, Adriatic Sea, Mediterranean.
01459050
Franco Banfi / Nudibranch (Cratena peregrina) on a sponge, Ist Island, Croatia, Adriatic Sea, Mediterranean.
Nudibranch (Janolus cristatus) Vela Luka, Korcula Island, Croatia, Adriatic Sea, Mediterranean
01459049
Franco Banfi / Nudibranch (Janolus cristatus) Vela Luka, Korcula Island, Croatia, Adriatic Sea, Mediterranean
Nudibranch (Flabellina affinis) Vela Luka, Korcula Island, Croatia, Adriatic Sea, Mediterranean.
01459048
Franco Banfi / Nudibranch (Flabellina affinis) Vela Luka, Korcula Island, Croatia, Adriatic Sea, Mediterranean.
Symbiotic emperor shrimp (Periclimenes imperator / Zenopontonia rex) living in the gills of a spanish nudibranch (Hexabranchus sanguineus) Red Sea, Egypt
01444744
Jeff Rotman / Symbiotic emperor shrimp (Periclimenes imperator / Zenopontonia rex) living in the gills of a spanish nudibranch (Hexabranchus sanguineus) Red Sea, Egypt
A nudibranch (Dendronotus frondosus) photographed in the field aquarium, Gulen, Norway. North East Atlantic.
01435893
Alex Mustard,Alex Mustard / A nudibranch (Dendronotus frondosus) photographed in the field aquarium, Gulen, Norway. North East Atlantic.
Nudibranch (Flabellina nobilis) photographed in the field aquarium in Gulen, Norway. North East Atlantic Ocean.
01435881
Alex Mustard,Alex Mustard / Nudibranch (Flabellina nobilis) photographed in the field aquarium in Gulen, Norway. North East Atlantic Ocean.
A nudibranch (Flabellina nobilis) feeding on a solitary hydroid (Tubularia indivisa), note how the hydroid is bent back as it is pulled into the nudibranch's mouth. Gulen, Bergen, Norway. North East A...
01435875
Alex Mustard,Alex Mustard / A nudibranch (Flabellina nobilis) feeding on a solitary hydroid (Tubularia indivisa), note how the hydroid is bent back as it is pulled into the nudibranch's mouth. Gulen, Bergen, Norway. North East A...
A portrait of a nudibranch ( Limacia clavigera) searching for food on algae. Gulen, Norway. North East Atlantic Ocean.
01435874
Alex Mustard,Alex Mustard / A portrait of a nudibranch ( Limacia clavigera) searching for food on algae. Gulen, Norway. North East Atlantic Ocean.
Sea slug or nudibranch (Ardeadoris / Glossodoris cruenta) New Caledonia, Pacific Ocean.
01636618
Pascal Kobeh / Sea slug or nudibranch (Ardeadoris / Glossodoris cruenta) New Caledonia, Pacific Ocean.
Emperor shrimp (Zenopontonia rex) female rides on the back of a nudirbranch (Tambja morosa), while picking food from the seabed. Anilao, Batangas marine protected area, Luzon, Philippines. Verde Islan...
01634738
Alex Mustard / Emperor shrimp (Zenopontonia rex) female rides on the back of a nudirbranch (Tambja morosa), while picking food from the seabed. Anilao, Batangas marine protected area, Luzon, Philippines. Verde Islan...
Nudibranch (Flabellina affinis). Canary Islands, Tenerife.
01635038
Sergio Hanquet / Nudibranch (Flabellina affinis). Canary Islands, Tenerife.
Sea slug (Melibe viridis) with oral hood for sifting sand in search of prey. Komodo, Indonesia.
01630274
David Hall / Sea slug (Melibe viridis) with oral hood for sifting sand in search of prey. Komodo, Indonesia.
Halgerda nudibranch (Halgerda batangas). Komodo, Indonesia.
01630270
David Hall / Halgerda nudibranch (Halgerda batangas). Komodo, Indonesia.
Free swimming juvenile spanish dancer (Hexabranchus sanguineus) in the night, Kenting National Park, Hengchun Peninsula, Taiwan
01627177
Magnus Lundgren / Wild Wonders of China / Free swimming juvenile spanish dancer (Hexabranchus sanguineus) in the night, Kenting National Park, Hengchun Peninsula, Taiwan
Free swimming juvenile spanish dancer (Hexabranchus sanguineus) in the night, Kenting National Park, Hengchun Peninsula, Taiwan
01627176
Magnus Lundgren / Wild Wonders of China / Free swimming juvenile spanish dancer (Hexabranchus sanguineus) in the night, Kenting National Park, Hengchun Peninsula, Taiwan
Bullock's hypselodoris (Hypselodoris bullockii) Xiaoliuqiu Island, Taiwan
01627125
Magnus Lundgren / Wild Wonders of China / Bullock's hypselodoris (Hypselodoris bullockii) Xiaoliuqiu Island, Taiwan
Caramel nudibranch (Glossodoris rufomarginata) . Xiaoliuqiu Island, Taiwan
01627107
Magnus Lundgren / Wild Wonders of China / Caramel nudibranch (Glossodoris rufomarginata) . Xiaoliuqiu Island, Taiwan
Dorid nudibranch (Hypselodoris maculosa) Kenting National Park, Hengchun Peninsula, Taiwan
01627182
Magnus Lundgren / Wild Wonders of China / Dorid nudibranch (Hypselodoris maculosa) Kenting National Park, Hengchun Peninsula, Taiwan
Dorid nudibranch (Chromodoris strigata) feedings on sponges. Kenting National Park, Hengchun Peninsula, Taiwan
01627175
Magnus Lundgren / Wild Wonders of China / Dorid nudibranch (Chromodoris strigata) feedings on sponges. Kenting National Park, Hengchun Peninsula, Taiwan
Dorid nudibranch (Glossodoris cincta) Kenting National Park, Hengchun Peninsula, Taiwan
01627180
Magnus Lundgren / Wild Wonders of China / Dorid nudibranch (Glossodoris cincta) Kenting National Park, Hengchun Peninsula, Taiwan
Dotted sea slug (Peltodoris atromaculata), Canary Islands
01624201
Pascal Kobeh / Dotted sea slug (Peltodoris atromaculata), Canary Islands
Mediterranean / Pink flabellina nudibranch(Flabellina affinis), Canary Islands
01624199
Pascal Kobeh / Mediterranean / Pink flabellina nudibranch(Flabellina affinis), Canary Islands
Nudibranch / sea slug giant doris (Hypselodoris picta), Canary Islands
01624198
Pascal Kobeh / Nudibranch / sea slug giant doris (Hypselodoris picta), Canary Islands
Anna's chromodoris nudibranchs (Chromodoris annae) courtship, Sulu sea, Philippines
01624241
Pascal Kobeh / Anna's chromodoris nudibranchs (Chromodoris annae) courtship, Sulu sea, Philippines
Anna's chromodoris nudibranchs (Chromodoris annae) courtship, Sulu sea, Philippines
01624240
Pascal Kobeh / Anna's chromodoris nudibranchs (Chromodoris annae) courtship, Sulu sea, Philippines
Lined Thuridilla / Orange-edged sapsucking nudibranch / sea slug (Thuridilla lineolata), Sulu sea, Philippines
01624239
Pascal Kobeh / Lined Thuridilla / Orange-edged sapsucking nudibranch / sea slug (Thuridilla lineolata), Sulu sea, Philippines
Leopard chromodoris nudibranch (Goniobranchus / Chromodoris leopardus), Sulu sea, Philippines
01624238
Pascal Kobeh / Leopard chromodoris nudibranch (Goniobranchus / Chromodoris leopardus), Sulu sea, Philippines
Giant doris nudibranch (Hypselodoris picta) on the sandy bottom, Canary Islands
01624221
Pascal Kobeh / Giant doris nudibranch (Hypselodoris picta) on the sandy bottom, Canary Islands
Nudibranch (Dondice occidentalis) feeding on algae in a land locked alakaline lagoon on Eleuthera, Bahamas.
01622112
Shane Gross / Nudibranch (Dondice occidentalis) feeding on algae in a land locked alakaline lagoon on Eleuthera, Bahamas.
Portrait of a colourful nudibranch (Chromodoris annae). Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
01628744
Alex Mustard / Portrait of a colourful nudibranch (Chromodoris annae). Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
Nudibranch - Flatworm Discodoris (Discodoris boholiensis). Lembeh Strait, North Sulawesi, Indonesia.
01618366
Georgette Douwma / Nudibranch - Flatworm Discodoris (Discodoris boholiensis). Lembeh Strait, North Sulawesi, Indonesia.
Solar-powered phyllodesmium (Phyllodesmium longicirrum) this species has evolved a symbiotic relationship with zooxanthellae. Lembeh Strait, North Sulawesi, Indonesia.
01618365
Georgette Douwma / Solar-powered phyllodesmium (Phyllodesmium longicirrum) this species has evolved a symbiotic relationship with zooxanthellae. Lembeh Strait, North Sulawesi, Indonesia.
Nudibranch (Cuthona yamasui) Lembeh Strait, North Sulawesi, Indonesia.
01618363
Georgette Douwma / Nudibranch (Cuthona yamasui) Lembeh Strait, North Sulawesi, Indonesia.
Nudibranch (Janolus savinkini) Lembeh Strat, North Sulawesi, Indonesia.
01618362
Georgette Douwma / Nudibranch (Janolus savinkini) Lembeh Strat, North Sulawesi, Indonesia.
Lined polycera (Polycera quadrilineata) nudibranch feeding on a kelp (Mebranipora membranacea) frond, Sula Sgeir, Scotland, UK, February.
01623510
SCOTLAND: The Big Picture / Lined polycera (Polycera quadrilineata) nudibranch feeding on a kelp (Mebranipora membranacea) frond, Sula Sgeir, Scotland, UK, February.
Painted balloon aeolis (Eubranchus tricolor) feeding on bryozoan, Loch Carron, Scotland, UK, January.
01623439
SCOTLAND: The Big Picture / Painted balloon aeolis (Eubranchus tricolor) feeding on bryozoan, Loch Carron, Scotland, UK, January.
Four lined nudibranch (Polycera quadrilineata) feeding on a bryzoan mat (Mebranipora membranacea) Scotland, UK, January.
01623437
SCOTLAND: The Big Picture / Four lined nudibranch (Polycera quadrilineata) feeding on a bryzoan mat (Mebranipora membranacea) Scotland, UK, January.
Nudibranch on tunicate (Coryphella sp.), Shetland Isles, Scotland.
01623376
SCOTLAND: The Big Picture / Nudibranch on tunicate (Coryphella sp.), Shetland Isles, Scotland.
Nudibranch (Phyllidia ocellata) West Papua, Indonesia. Indo-West Pacific.
01618403
Georgette Douwma / Nudibranch (Phyllidia ocellata) West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Ardeadoris cruenta / Glossodoris cruenta). West Papua, Indonesia. Indo-West Pacific.
01618402
Georgette Douwma / Nudibranch (Ardeadoris cruenta / Glossodoris cruenta). West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Miamira alleni) West Papua, Indonesia. Indo-West Pacific.
01618401
Georgette Douwma / Nudibranch (Miamira alleni) West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Ardeadoris cruenta / Glossodoris cruenta). West Papua, Indonesia. Indo-West Pacific.
01618400
Georgette Douwma / Nudibranch (Ardeadoris cruenta / Glossodoris cruenta). West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Nembrotha sp) feeding on tunicates. West Papua, Indonesia. Indo-West Pacific.
01618399
Georgette Douwma / Nudibranch (Nembrotha sp) feeding on tunicates. West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Goniobranchus reticulatus) West Papua, Indonesia. Indo-West Pacific.
01618398
Georgette Douwma / Nudibranch (Goniobranchus reticulatus) West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Reticulida sp) West Papua, Indonesia. Indo-West Pacific.
01618397
Georgette Douwma / Nudibranch (Reticulida sp) West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Mexichromis pusilla) West Papua, Indonesia. Indo-West Pacific.
01618396
Georgette Douwma / Nudibranch (Mexichromis pusilla) West Papua, Indonesia. Indo-West Pacific.
Flatworm Discodoris (Discodoris boholiensis). West Papua, Indonesia. Indo-West Pacific.
01618395
Georgette Douwma / Flatworm Discodoris (Discodoris boholiensis). West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Halgerda batangas) West Papua, Indonesia. Indo-West Pacific.
01618394
Georgette Douwma / Nudibranch (Halgerda batangas) West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Nembrotha lineolata) West Papua, Indonesia. Indo-West Pacific.
01618393
Georgette Douwma / Nudibranch (Nembrotha lineolata) West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Gymnodoris inornata) West Papua, Indonesia. Indo-West Pacific.
01618392
Georgette Douwma / Nudibranch (Gymnodoris inornata) West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Glossodoris acosti) West Papua, Indonesia. Indo-West Pacific.
01618391
Georgette Douwma / Nudibranch (Glossodoris acosti) West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Halgerda batangas) mating. West Papua, Indonesia. Indo-West Pacific.
01618390
Georgette Douwma / Nudibranch (Halgerda batangas) mating. West Papua, Indonesia. Indo-West Pacific.
Painted thicacera (Thecathera picta). West Papua, Indonesia. Indo-West Pacific.
01618389
Georgette Douwma / Painted thicacera (Thecathera picta). West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Nembrotha lineolata) West Papua, Indonesia. Indo-West Pacific.
01618388
Georgette Douwma / Nudibranch (Nembrotha lineolata) West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Jorunna funebris) laying eggs. West Papua, Indonesia. Indo-West Pacific.
01618387
Georgette Douwma / Nudibranch (Jorunna funebris) laying eggs. West Papua, Indonesia. Indo-West Pacific.
Nudibranch (Cuthona kanga) Sulu Sea, Philippines
01619944
Pascal Kobeh / Nudibranch (Cuthona kanga) Sulu Sea, Philippines
Lined nembrotha nudibranch (Nembrotha Lineolata) Sulu Sea, Philippines
01619943
Pascal Kobeh / Lined nembrotha nudibranch (Nembrotha Lineolata) Sulu Sea, Philippines
Pelagic nudibranch / Blue sea slug (Glaucus atlanticus) along with a much smaller relative, (Glaucilla sp) feeding on a Portuguese man o' war, (Physalia utriculus) Kona, Hawaii, Hawaiian Islands,...
01612557
Doug Perrine / Pelagic nudibranch / Blue sea slug (Glaucus atlanticus) along with a much smaller relative, (Glaucilla sp) feeding on a Portuguese man o' war, (Physalia utriculus) Kona, Hawaii, Hawaiian Islands,...
Robust frond-aeolis (Dendronotus robustus) nudibranch on Kelp. Tasiilaq, East Greenland. April.
01614825
Franco Banfi / Robust frond-aeolis (Dendronotus robustus) nudibranch on Kelp. Tasiilaq, East Greenland. April.
Nudibranch (Chromodoris tinctoria) North Sulawesi, Indonesia.
01611714
Georgette Douwma / Nudibranch (Chromodoris tinctoria) North Sulawesi, Indonesia.
Nudibranch (Hypselodoris apolegma) North Sulawesi, Indonesia.
01611715
Georgette Douwma / Nudibranch (Hypselodoris apolegma) North Sulawesi, Indonesia.
Paddle-flap scorpionfish (Rhinopias eschmeyeri) keeping an eye on passing Nudibranch (Miamira alleni), Philippines.
01607237
David Fleetham / Paddle-flap scorpionfish (Rhinopias eschmeyeri) keeping an eye on passing Nudibranch (Miamira alleni), Philippines.
Imperial commensal shrimp (Periclimenes imperator / Zenopontonia rex) on Spanish dancer nudibranch (Hexabranchus sanguineus) at night. Philippines.
01607232
David Fleetham / Imperial commensal shrimp (Periclimenes imperator / Zenopontonia rex) on Spanish dancer nudibranch (Hexabranchus sanguineus) at night. Philippines.
Tailing nudibranchs (Hypselodoris tryoni) on colourful sponges. This is a common behaviour in this species, where one individual tracks another, also known as queuing or tailgating. It may be relating...
01612302
Alex Mustard / Tailing nudibranchs (Hypselodoris tryoni) on colourful sponges. This is a common behaviour in this species, where one individual tracks another, also known as queuing or tailgating. It may be relating...
Portrait of a nudibranch (Hypselodoris infucata) with orange-red rhinophores. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
01612301
Alex Mustard / Portrait of a nudibranch (Hypselodoris infucata) with orange-red rhinophores. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
Portrait of a nudibranch (Hypselodoris tryoni). Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
01612300
Alex Mustard / Portrait of a nudibranch (Hypselodoris tryoni). Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
Nudibranch egg mass, Pak Lap Tsa, Sai Kung archipelago, Hong Kong, China.
01608437
Magnus Lundgren / Wild Wonders of China / Nudibranch egg mass, Pak Lap Tsa, Sai Kung archipelago, Hong Kong, China.
Gold-spotted chromodorid nudibranch (Chromodoris aureopurpurea) with a soft coral behind. Ninepin Group or Kwo Chau Islands, Sai Kung District of Hong Kong, China
01608486
Magnus Lundgren / Wild Wonders of China / Gold-spotted chromodorid nudibranch (Chromodoris aureopurpurea) with a soft coral behind. Ninepin Group or Kwo Chau Islands, Sai Kung District of Hong Kong, China
Gold-spotted Chromodorid nudibranch (Chromodoris aureopurpurea, Ninepin Group or Kwo Chau Islands, Sai Kung District of Hong Kong, China
01608485
Magnus Lundgren / Wild Wonders of China / Gold-spotted Chromodorid nudibranch (Chromodoris aureopurpurea, Ninepin Group or Kwo Chau Islands, Sai Kung District of Hong Kong, China
Nudibranch (Kaloplocamus acutus) Bluff Island, Hong Kong UNESCO Global Geopark, Hong Kong, China.
01608449
Magnus Lundgren / Wild Wonders of China / Nudibranch (Kaloplocamus acutus) Bluff Island, Hong Kong UNESCO Global Geopark, Hong Kong, China.
Three Dorid nudibranchs (Chromodoris orientalis) gathering to mate, Po Bin Chau, Sai Kung archipelago, Hong Kong, China.
01608354
Magnus Lundgren / Wild Wonders of China / Three Dorid nudibranchs (Chromodoris orientalis) gathering to mate, Po Bin Chau, Sai Kung archipelago, Hong Kong, China.
Dorid nudibranch (Hypselodoris festiva) Sai Kung, Hong Kong, China.
01608353
Magnus Lundgren / Wild Wonders of China / Dorid nudibranch (Hypselodoris festiva) Sai Kung, Hong Kong, China.
Nudibranch (Cadlinella ornatissima), yellow with pink tipped tubercles and white rhinophores. Japan. March.
01606801
Tony Wu / Nudibranch (Cadlinella ornatissima), yellow with pink tipped tubercles and white rhinophores. Japan. March.
Nudibranch (Ceratosoma sp.) pair. Puerto Galera, Philippines.
01607082
Georgette Douwma / Nudibranch (Ceratosoma sp.) pair. Puerto Galera, Philippines.
Nudibranch (Ceratosoma trilobatum) Puerto Galera, Philippines.
01607081
Georgette Douwma / Nudibranch (Ceratosoma trilobatum) Puerto Galera, Philippines.
Nudibranch (Nembrotha lineolata) feeding on ascidians. Puerto Galera, Philippines.
01607079
Georgette Douwma / Nudibranch (Nembrotha lineolata) feeding on ascidians. Puerto Galera, Philippines.
Swollen phyllidia (Phyllidia varicosa) Puerto Galera, Philippines.
01607078
Georgette Douwma / Swollen phyllidia (Phyllidia varicosa) Puerto Galera, Philippines.
RF - Willans's chromodoris nudibranch (Chromodoris willani) Puerto Galera, Philippines. (This image may be licensed either as rights managed or royalty free.)
01607124
Georgette Douwma / RF - Willans's chromodoris nudibranch (Chromodoris willani) Puerto Galera, Philippines. (This image may be licensed either as rights managed or royalty free.)
Nudibranch (Chromodoris willani), Triton Bay, near Kaimana, West Papua, Indonesia
01588815
Linda Pitkin / Nudibranch (Chromodoris willani), Triton Bay, near Kaimana, West Papua, Indonesia
Nudibranch (Goniobranchus leopardus), Triton Bay, near Kaimana, West Papua, Indonesia
01588814
Linda Pitkin / Nudibranch (Goniobranchus leopardus), Triton Bay, near Kaimana, West Papua, Indonesia
Nudibranch (Thecacera picta), Triton Bay, near Kaimana, West Papua, Indonesia
01588813
Linda Pitkin / Nudibranch (Thecacera picta), Triton Bay, near Kaimana, West Papua, Indonesia
Blue dragon / Blue seaslug (Glaucus atlanticus) feeding on a Portuguese man o' war (Physalia utriculus)  along with a much smaller relative, Glaucilla sp. (upside down); Glaucus and Glaucilla store th...
01595306
Doug Perrine / Blue dragon / Blue seaslug (Glaucus atlanticus) feeding on a Portuguese man o' war (Physalia utriculus) along with a much smaller relative, Glaucilla sp. (upside down); Glaucus and Glaucilla store th...
Frond eolis (Dendronotus frondosus) Novaya Zemlya, Russian Arctic, July
01600247
Olga Kamenskaya / Frond eolis (Dendronotus frondosus) Novaya Zemlya, Russian Arctic, July
Blue sea slug (Glaucus atlanticus) approaching the venom-filled tentacles of a Indo-Pacific Portuguese man-of-war (Physalia utriculus). Both were washed ashore as part of a mass, multi-day stranding o...
01592331
Tony Wu / Blue sea slug (Glaucus atlanticus) approaching the venom-filled tentacles of a Indo-Pacific Portuguese man-of-war (Physalia utriculus). Both were washed ashore as part of a mass, multi-day stranding o...
Blue sea slug (Glaucus atlanticus) that was washed ashore with a mass, multi-day stranding of thousands of Indo-Pacific Portuguese man-of-war (Physalia utriculus). This species predates Portuguese man...
01592330
Tony Wu / Blue sea slug (Glaucus atlanticus) that was washed ashore with a mass, multi-day stranding of thousands of Indo-Pacific Portuguese man-of-war (Physalia utriculus). This species predates Portuguese man...
Nudibranch (Tambja gabrielae) crawling on a discarded plastic water bottle, this individual was actually laying its eggs on the far side of the plastic bottle. Ambon Bay, Ambon, Maluku Archipelago, In...
01598549
Alex Mustard / Nudibranch (Tambja gabrielae) crawling on a discarded plastic water bottle, this individual was actually laying its eggs on the far side of the plastic bottle. Ambon Bay, Ambon, Maluku Archipelago, In...
Detail of rhinopores and the colour pattern of a toxic Nudibranch (Goniobranchus coi) on a coral reef. Ambon Bay, Ambon, Maluku Archipelago, Indonesia. Banda Sea, tropical west Pacific Ocean.
01598543
Alex Mustard / Detail of rhinopores and the colour pattern of a toxic Nudibranch (Goniobranchus coi) on a coral reef. Ambon Bay, Ambon, Maluku Archipelago, Indonesia. Banda Sea, tropical west Pacific Ocean.
Nudibranch (Goniobranchus hintuanensis) portrait showing  rhinophores. Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.
01598489
Alex Mustard / Nudibranch (Goniobranchus hintuanensis) portrait showing rhinophores. Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.
Spanish shawl nudibranch (Flabellina iodinea), Salsipuedes Island Protected Area, Gulf of California (Sea of Cortez), Mexico, July
01595873
Claudio Contreras / Spanish shawl nudibranch (Flabellina iodinea), Salsipuedes Island Protected Area, Gulf of California (Sea of Cortez), Mexico, July