Alex Mustard / 2020VISION / Nudibranch eggs (Tritonia hombergi) Loch Carron, Ross and Cromarty, Scotland, UK, April

Juergen Freund / Chromodoris nudibranch (Cadlinella sp.) Lembeh Strait, North Sulawesi, Indonesia.

Birgitte Wilms / Nudibranch laying eggs, Indonesia

Norbert Wu / Flamingo Tongue Snail (Cyphoma gibbosum) feeding on Common Sea Fan (Gorgonia ventalina) showing deep purple tone where the Sea Fan has released protective compounds, Saba, Caribbean

Fred Bavendam / Cowry living on Sea Fan (Solenocaulon sp), Bali, Indonesia

Norbert Wu / Cone Snail (Conus dalli), Sea of Cortez, Baja California, Mexico

Flip Nicklin / Naked Sea Butterfly (Clione limacina) underwater portrait, Arctic

Michele Westmorland / Nudibranch (Aegires serenae), Palau, Micronesia.

Michele Westmorland / Sea slug (Chelidonura amoena) pair mating, Palau, Micronesia

Georgette Douwma / Edible sea cucumber (Holothuria edulis) one of the edible species of sea cucumbers served as 'sea slugs', 'trepang' or 'Beche de mer'. Maldives, Indian Ocean

David Shale / Gastropod shell. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Gastropod sea snail showing opening operculum ('lid'). Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.