Bertie Gregory / 2020VISION / Grey herons (Ardea cinerea) standing in symmetry in Regent's Park, London, England, UK, July

Doug Perrine / Dorid nudibranch {Nembrotha kubaryana} feeding on tunicates, Borneo

Magnus Lundgren / Wild Wonders of China / Dorid nudibranch (Hypselodoris maculosa) Kenting National Park, Hengchun Peninsula, Taiwan

Magnus Lundgren / Wild Wonders of China / Dorid nudibranch (Chromodoris strigata) feedings on sponges. Kenting National Park, Hengchun Peninsula, Taiwan

Magnus Lundgren / Wild Wonders of China / Dorid nudibranch (Glossodoris cincta) Kenting National Park, Hengchun Peninsula, Taiwan

Gary Bell/ Oceanwide / Dorid Nudibranch (Phyllidia varicosa), Anilao, Philippines

David Fleetham / Imperial commensal shrimp (Periclimenes imperator / Zenopontonia rex) on Spanish dancer nudibranch (Hexabranchus sanguineus) at night. Philippines.

Magnus Lundgren / Wild Wonders of China / Three Dorid nudibranchs (Chromodoris orientalis) gathering to mate, Po Bin Chau, Sai Kung archipelago, Hong Kong, China.

Magnus Lundgren / Wild Wonders of China / Dorid nudibranch (Hypselodoris festiva) Sai Kung, Hong Kong, China.

Franco Banfi / Dorid nudibranch (Phyllidia ocellata) on discarded plastic bottle, Pulau Dofior, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Georgette Douwma / Fried eggs Hoplodoris nudibranch (Carminodoris estrelyado), Rinca, Indonesia. December.

Constantinos Petrinos / Dorid nudibranch (Rostanga sp) laying its egg ribbon, camouflaged on a pink sponge. Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Dorid nudibranch (Rostanga sp) laying its egg ribbon, camouflaged on a pink sponge. Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Dorid nudibranch (Rostanga sp) laying its egg ribbon, camouflaged on a pink sponge. Lembeh Strait, North Sulawesi, Indonesia.

Pete Oxford / Nudibranch (Phyllidia coelestis), Cenderawasih Bay, West Papua, Indonesia

Georgette Douwma / Dorid nudibranch (Halgerda carlsoni) Mabul, Malaysia.

Georgette Douwma / Dorid nudibranch - Red lined jorunna (Jorunna rubescens) Kentrodorididae. Lembeh Strait, Sulawesi, Indonesia.

Richard Robinson / Dorid nudibranch (Aphelodoris luctuosa) on a red coral (Errina novazelandiae) in Doubtful Sound, Fiordland National Park, New Zealand..

Richard Robinson / Dorid nudibranch (Archidoris wellingtonensis) in Dusky Sound, Fiordland National Park, New Zealand.

Richard Robinson / A dorid nudibranch (Hoplodoris nodulosa) in Dusky Sound, Fiordland National Park, New Zealand.

Pete Oxford / Sky blue Phyllidia Dorid nudibranch (Phyllidia coelestis) Coral reef, Fiji, South Pacific.

Juergen Freund / Nudibranch (Discodoris sp.) with ribbon of eggs, Raja Ampat, West Papua, Indonesia

Juergen Freund / Ribbon egg clusters of a dorid nudibranch Raja Ampat, West Papua, Indonesia

Franco Banfi / Dorid nudibranch (Notodoris minor) Maldives, Indian Ocean

Juergen Freund / Dorid nudibranch, Lembeh Strait, North Sulawesi, Indonesia

Juergen Freund / Dorid nudibranch {Chromodoris lochi} Phillipines

Juergen Freund / Dorid nudibranch (Hypselodoris messinensis), Mediterranean

Juergen Freund / Dorid nudibranch / sea lemon {Anisodoris nobilis} and starfish, Pacific ocean, Canada

Juergen Freund / Dorid nudibranch {Nembrotha kubaryana} Indo-Pacific

Juergen Freund / Ceylon dorid nudibranch {Gymnodoris ceylonica} Indo-Pacific

Solvin Zankl / Dorid nudibranch {Jorunna funebris}

Solvin Zankl / Dorid nudibranch {Nembrotha kubaryana} Lembeh, Sulawesi

Solvin Zankl / Nudibranchs making contact prior to mating {Risbecia tryoni} Lambeh, Sulawesi

Solvin Zankl / Nudibranch {Risbecia tryoni} Lembeh Strait, Indonesia

Fred Bavendam / Dorid Nudibranch (Reticulidia halgerda) underwater, Lembeh Strait, Indonesia

Carine Schrurs / Dorid nudibranch climbing over Bearded scorpionfish Anilao, Batangas, Philippines

Constantinos Petrinos / Dorid nudibranch {Dendrodoris guttata} Lembeh Strait Sulawesi Indonesia

Constantinos Petrinos / Dorid nudibranch {Tambja morosa} Secret Bay, Bali Indonesia

Jose B. Ruiz / Dorid nudibranch {Hypselodoris picta} Mediterranean

Juergen Freund / Dorid nudibranch (Tambja sp) Pacific Phillippines

Juergen Freund / Dorid nudibranchs {Risbecia tryoni} Indo-Pacific

Constantinos Petrinos / Dorid nudibranch {Phyllidia varicosa} on Ascidian {Polycarpa aurata} Sulawesi Indonesia

Constantinos Petrinos / Dorid nudibranch {Risbecia tryoni} with pair of commensal Imperial shrimps {Periclimenes imperator / Zenopontonia rex} Lembeh straits, Sulawesi, Indonesia

Carine Schrurs / Dorid nudibranch {Gymnodoris aurita} Anilao, Batangas, Philippines

Roberto Rinaldi / Two nudibranchs / sea slugs (dorids), New South Wales, Australia. ^^^Dorids are the largest group of nudibranchs, typically they have a pair of rhinopores at the front of the head used to locate food...

Juergen Freund / Dorid nudibranch {Nembrotha sp} South Pacific, Philippines.

Juergen Freund / Nudibranch {Nembrotha rutilans} feeding on tunicate. Philippines

Carine Schrurs / Bearded scorpionfish with Dorid nudibranch climbing over it Anilao Batangas Philippines

Shane Gross / San Diego dorid (Diaulula sandiegensis) nudibranch resting on seaweed, Barkley Sound, Vancouver Island, British Columbia, Canada.

Shane Gross / Noble dorid (Peltodoris nobilis) resting on rocks surrounded by Sea urchins (Strongylocentrotus sp.) and Orange sea cucumbers (Cucumaria miniata), Barkley Sound, Vancouver Island, British Columbia, Ca...

Franco Banfi / Nudibranch (Austrodoris kerguelenensis) on seabed, Antarctic Peninsula, Antarctica, Southern Ocean.

Shane Gross / Pair of Yellow margin dorids (Cadlina luteomarginata), Vancouver Island, British Columbia, Canada, Pacific Ocean.

Magnus Lundgren / Dorid nudibranch (Doriprismatica atromarginata), close up, Triton Bay, West Papua, Indonesia, Pacific Ocean.

Alex Mustard / Yellow nudibranch / Monterey sea lemon (Archidoris montereyensis) crawls over kelp. Browning Pass, Port Hardy, Vancouver Island, British Columbia, Canada. Queen Charlotte Strait, North East Pacific Oc...