Claudio Contreras / Spanish shawl nudibranch (Flabellina iodinea), Salsipuedes Island Protected Area, Gulf of California (Sea of Cortez), Mexico, July

Georgette Douwma / Nudibranch (Pteraeolidia ianthina), Lembeh Straits, North Sulawesi, Indonesia. October.

Sue Daly / Nudibranch (Flabellina gracilis) feeding on bryozoan (Membranipora membranacea), Trondheimsfjord, Norway, July.

Sue Daly / Nudibranch (Flabellina browni), Trondheimsfjord, Norway, July.

Sue Daly / Nudibranch (Flabellina browni), Trondheimsfjord, Norway, July.

Sue Daly / Nudibranch (Flabellina browni), Trondheimsfjord, Norway, July.

Sue Daly / Scarlet lady nudibranch (Flabellina browni) Sark, British Channel Islands, July.

Georgette Douwma / Nudibranch (Flabellina exoptata) Lembeh Strait, North Sulawesi, Indonesia.

Solvin Zankl / White tipped tentacle sea slug (Flabellina falklandica) Comau Fjord, Patagonia, Chile, Atlantic Ocean

Alex Mustard / A tiny undescribed amphipod (>500 microns) perched on the cerata of an undescribed Nudibranch (Flabellina sp). Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Oc...

Alex Mustard / Nudibranch (Flabellina lineata) Gulen, Norway. North Sea, North East Atlantic Ocean, March

Constantinos Petrinos / Purple nudibranch (Flabellina affinis) laying its egg mass. Athens, Attica Region, Greece. Saronic Gulf, Aegean Sea. August.