Japanese Nudibranch, Bornella japonica, Seogwipo, Jeju-do, Cheju Island, South Korea

Japanese Nudibranch, Bornella japonica, Supsom Island, Seogwipo, Jeju-do, Cheju Island, South Korea.

Japanese Nudibranch, Bornella japonica, Supsom Island, Seogwipo, Jeju-do, Cheju Island, South Korea.

Dorid Nudibranch, Chromodoris tinctoria, Little Munsom, Seogwipo, Jeju-do, Cheju Island, South Korea.

Nudibranch, Polycera quadrilineata, Stokmarknes, Hadsel, Nordland, Norway.

Nudibranch, Polycera quadrilineata, Stokmarknes, Hadsel, Nordland, Norway.

Nudibranch, Polycera quadrilineata, Stokmarknes, Hadsel, Nordland, Norway.

Nudibranch, Polycera quadrilineata, Stokmarknes, Hadsel, Nordland, Norway.

Nudibranch, Polycera quadrilineata, Stokmarknes, Hadsel, Nordland, Norway.

Detail of cerata, Facelina bostoniensis, Sørfjorden, Bergen, Hordaland, Norway.

Detail of copulation, transfer of sperm, Facelina bostoniensis, Sørfjorden, Bergen, Hordaland, Norway.

Nudibranch, Limacia clavigera, on Bryozoan, Membranipora membranacea, Bergen, Hordaland, Norway.

Nudibranch, Flabellina pedata, and European Edible Sea Urchin, Echinus esculentus, Øygarden, Hordaland, Norway.

Nudibranch, Flabellina pedata, on kelp stipes, Laminaria hyperborea, Øygarden, Hordaland, Norway.

Nudibranch, Flabellina pedata, on kelp stipes, Laminaria hyperborea, Øygarden, Hordaland, Norway.

Nudibranch, Hypselodoris picta, Cabo Frio, Rio de Janeiro, Brazil, South Atlantic Ocean

Nudibranch, Hypselodoris marci, Cabo Frio, Rio de Janeiro, Brazil, South Atlantic Ocean

Nudibranch, Hypselodoris marci, Cabo Frio, Rio de Janeiro, Brazil, South Atlantic Ocean

Flabellina affinis, Islas Medas, L'Estartit, Costa Brava, Spain, Mediterranean Ocean

Cratena peregrina, Nudibranch, Islas Medas, L'Estartit, Costa Brava, Spain, Mediterranean Ocean

Diver, Nudibranch, Flabbelina pellucida, Tubularia indvisa, Common sun star, Crossaster papposus, Yellow sun star, Solaster endeca, and Painted topshell, Calliostoma zizyphinum, Gulen, Sogn og fjordane, Norway.

Thuridilla bayeri, Onemoba'a, Tomia, Kepulauan Wakatobi National park, Southeast Sulawesi, Indonesia, Banda Sea, Indian Ocean

Hypselodoris bullockii, Mating, Onemoba'a, Tomia, Kepulauan Wakatobi National park, Southeast Sulawesi, Indonesia, Banda Sea, Indian Ocean

Hypselodoris bullockii, with commensal shrimp, Periclimenes psamathe, Onemoba'a, Tomia, Kepulauan Wakatobi National park, Southeast Sulawesi, Indonesia, Banda Sea, Indian Ocean

Nudibranch, Flabbelina pellucida, on Hydroid, Tubularia indvisa, Gulen, Sogn og fjordane, Norway, North Atlantic Ocean.

Hypselodoris bullockii, Onemoba'a, Tomia, Kepulauan Wakatobi National park, Southeast Sulawesi, Indonesia, Banda Sea, Indian Ocean

Saccoglossan Snail, Thuridilla hopei, Marseille, Les Calanques, Provence Alpes Cote D'Azur, France, Mediterranean Sea

Saccoglossan Snail, Thuridilla hopei, Marseille, Les Calanques, Provence Alpes Cote D'Azur, France, Mediterranean Sea

Unidentified Nudibranch, Janolus sp?, Naama bay, Sinai, Egypt, Red Sea

Unidentified Nudibranch, Naama bay, Sinai, Egypt, Red Sea.

Lettuce Sea Slug, Elysia crispata, Saba, Netherlands Antilles, Caribbean Sea

Nudibranch, Polycera quadrilineata, on Kelp frond, Laminaria hyperborea, Øygarden, Hordaland, Norway, North Atlantic Ocean

Nudibranch, Flabellina pellucida, Portrait, Øygarden, Hordaland, Norway, North Atlantic Ocean

Nudibranch, Limacia clavigera, Bergen, Hordaland, Norway, North Atlantic Ocean

Nudibranch, Limacia clavigera, Bergen, Hordaland, Norway, North Atlantic Ocean

Nudibranch, Aeolidia sp., Øygarden, Hordaland, Norway, North Atlantic Ocean

Nudibranch, Aeolidia sp., Øygarden, Hordaland, Norway, North Atlantic Ocean

Nudibranch, Polycera quadrliniata, and kelp, Laminaria hyperborea, Detail, Øygarden, Hordaland, Norway, North Atlantic Ocean

Nudibranch, Polycera quadrilineata, on Kelp frond, Laminaria hyperborea, Øygarden, Hordaland, Norway, North Atlantic Ocean

Nudibranch, Limacia clavigera, on Bryozoan, Membranipora membranacea, Øygarden, Hordaland, Norway, North Atlantic Ocean

Nudibranch, Flabellina pellucida, Øygarden, Hordaland, Norway, North Atlantic Ocean

Pyjama nudibranch, Chromodoris quadricolor, on unknown sponge, Naama bay, Sinai, Egypt, Red Sea

Pyjama Nudibranch, Chromodoris quadricolor, Naama bay, Sinai, Egypt, Red Sea

Nudibranch, Risbecia pulchella, Mating behavior, Hurgada, Egypt, Red Sea

Nudibranch, Flabellina pedata, Bergen, Hordaland, Norway, North Atlantic Ocean

Nudibranch, Flabellina verrucosa, feeding on hydroid, Tubularia larynx, Øygarden, Hordaland, Norway, North Atlantic Ocean

Nudibranch, Flabellina verrucosa, Øygarden, Hordaland, Norway, North Atlantic Ocean

Nudibranch, Polycera quadrilineata, Hafrsfjord, Rogaland, Norway, North Atlantic Ocean