Jordi Chias / Sea angel (Clione limacina), Antarctic Peninsula, Antarctica.

Franco Banfi / Naked sea butterfly sea slug (Clione limacina) swimming in front of iceberg. Tasiilaq, East Greenland. April.

Solvin Zankl / Juvenile sea slug (Thliptodon diaphana) captive deep sea species from Atlantic Ocean off Cape Verde.

Pal Hermansen / Naked sea butterfly (Clione limacina) against black background.

Franco Banfi / Nudibranch (Flabellina affinis) close to Teti wreck, Vis Island, Croatia, Adriatic Sea, Mediterranean

Franco Banfi / Nudibranch (Cratena peregrina) Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Couple of nudibranchs (Hypselodoris fontandraui) Ponza Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Nudibranch (Nembrotha rutilans) feeding on ascidian, Rhopalaea, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Franco Banfi / Nudibranch (Thecacera picta) Friwinbonda Point, Kri island, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Franco Banfi / Nudibranch (Nembrotha cristata) Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Franco Banfi / Nudibranch ( Risbecia tryoni) at Three sisters dive site, Farondi Island, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Franco Banfi / Nudibranchs (Flabellina affinis) at 'Punta Madonna' dive-site, Ponza Island, Italy, Tyrrhenian Sea, Mediterranean