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

Tony Wu / Nudibranchs (Nembrotha kubaryana) mating pair on a coral reef in Ambon, Indonesia

Alex Mustard / High magnification photo of Nudibranch (Nembrotha kubaryana), showing orange mouth parts and sensory rhinophores, and green gills (out of focus) Bitung, North Sulawesi, Indonesia. Lembeh Strait, Moluc...

Juergen Freund / Nudibranchs (Nembrotha kubaryana) mating. Lembeh Strait, North Sulawesi, Indonesia

Juergen Freund / Brightly coloured Nudibranchs (Nembrotha kubaryana) on the sea bed. 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

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

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

Tim Laman / Pair of Nudibranchs (Nembrotha kubaryana) on coral reef, Malapascua Island, Visayan Sea, Philippines

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

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

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

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

Joel Sartore / Photo Ark / Nudibranch (Hypselodoris apolegma), Variable neon slug (Nembrotha kubaryana), Golden Nembrotha (Nembrotha aurea), Nudibranch (Hypselodoris bullockii), Anna?s chromodoris (Chromodoris annae) and Willan...