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

Solvin Zankl / Nudibranch {Nembrotha purpureolineolata} Lembeh Strait, Indonesia

Michele Westmorland / Nudibranch (Nembrotha purpureolineata) feeding, Cannibal Rock, Rinca Island, Indonesia

Georgette Douwma / Nudibranch (Nembrotha chamberlaini). Superfamily Phanerobrancia, family Polyceridae, subfamily Nembrothhinae. Rinca, Komodo National Park, Indonesia.

Birgitte Wilms / Nudibranch (Nembrotha sp) pair mating, Papua New Guinea

Birgitte Wilms / Nudibranch (Nembrotha sp) pair mating, Solomon Islands

Juergen Freund / Purple nembrotha nudibranch (Nembrotha purpureolineolata) seen from above. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Brightly coloured Nudibranch (Nembrotha kubaryana) perched on a piece of coral. Lembeh Strait, North Sulawesi, Indonesia

Juergen Freund / Brightly coloured Nudibranch (Nembrotha kubaryana) perched on a piece of coral. Lembeh Strait, North Sulawesi, Indonesia

Juergen Freund / Nembrotha nudibranch (Nembrotha yonowae) on red sponge, Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Nembrotha nudibranch (Nembrotha yonowae) pair mating. Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Nembrotha nudibranch (Nembrotha sp) crawling on a Golden sea squirt / or tunicate (Polycarpa aurata). Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Nudibranch (Nembrotha cristata) on a fan coral. Misool, Raja Ampat, West Papua, Indonesia

Juergen Freund / Nembrotha nudibranch (Nembrotha yonowae). Misool, Raja Ampat, West Papua, Indonesia

Tim Laman / Nudibranch (Nembrotha kubaryana) close up, Pisang Islands, West of Fak Fak Peninsula. West Papua, Indonesia, April 2007

Tim Laman / Nudibranch (Nembrotha purpureolineata) feeding on Tunicates (Ascidians) in coral reef system, West Papua, Indonesia, April 2007

Tim Laman / Nudibranch (Nembrotha kubaryana) close up, with colourful stripes, West Papua, Indonesia, April 2007

Tim Laman / Portrait of woman scubadiver (Apolinar Quinto) gazing at a large nudibranch, Malapascua Island, Visayan Sea, Philippines

Sue Daly / Nudibranch (Nembrotha kubaryana) amongst tunicates, Lembeh Straits, Sulawesi, Indonesia

Georgette Douwma / Nudibranch (Nembrotha cristata) Rinca, Indonesia.

Chris Newbert / Nudibranch (Nembrotha sp) pair mating showing a detail of genitalia, Indonesia

Chris Newbert / Nembrotha Nudibranch (Nembrotha sp) pair mating, Indonesia

Georgette Douwma / Nudibranch {Nembrotha chamberlaini} feeding on bryozoa. Rinca, Indonesia

Georgette Douwma / Nudibranch {Nembrotha kubaryana} pair feeding on Ascidians / Sea squirts (Sycoza sp) Rinca, Indonesia

Georgette Douwma / Nudibranch {Nembrotha kubaryana} pair feeding on Ascidians / sea squirts (Sycoza sp) Rinca, Indonesia

Georgette Douwma / Nudibranch {Nembrotha chamberlaini} Rinca, Indonesia

Georgette Douwma / Nudibranch {Nembrotha cristata} feeding on Ascidians / sea squirts. Rinca, Indonesia

Georgette Douwma / Nudibranch {Nembrotha chamberlaini} Rinca, Indonesia

Constantinos Petrinos / Nudibranchs mating (Nembrotha purpureolineata) Sulawesi, Indonesia

Constantinos Petrinos / Nudibranch (Nembrotha carlsoni) Sulawesi, Indonesia

Chris Newbert / Nudibranch (Nembrotha sp) 40 feet deep, Papua New Guinea

Chris Newbert / Nudibranch (Nembrotha lineolata) on algae, 60 feet deep, Papua New Guinea

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

Juergen Freund / Nudibranch {Nembrotha sp} Indo-Pacific

Juergen Freund / Nudibranch {Nembrotha sp} on tunicate, Indo-Pacific

Juergen Freund / Nudibranch {Nembrotha chamberlaini} on tunicate, Indo-Pacific

Solvin Zankl / Nudibranch {Nembrotha kubaryana} Lembeh Strait, Indonesia

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

Solvin Zankl / Nudibranchs mating {Nembrotha rutilans} Lembeh, Sulawesi

Birgitte Wilms / Nudibranch (Nembrotha lineolata) laying eggs on a Ink-spot Ascidian (Polycarpa aurata), Solomon Islands

Fred Bavendam / Nudibranch (Nembrotha sp), Manado, North Sulawesi, Indonesia

Fred Bavendam / Nembrotha Nudibranch (Nembrotha rutilans) portrait, underwater, Manado, North Sulawesi, Indonesia

Fred Bavendam / Nudibranch (Nembrotha sp) underwater, side view, Manado, North Sulawesi, Indonesia

Constantinos Petrinos / Nudibranch laying eggs {Nembrotha purpureolineata} Sulawesi, Indonesia

Juergen Freund / Nudibranch (Nembrotha rutilans) feeds on tunicate. Philippines, Pacific Ocean

Constantinos Petrinos / Mating nudibranchs {Nemobrotha purpureolineata} Sulawesi, Indonesia Indo-Pacific

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