Philippe Clement / Lined top shells (Phorcus lineatus) in a rock pool, Normandy, France, June

Philippe Clement / Lined top shells (Phorcus lineatus) and Common european limpets (Patella vulgata) in a rock pool, Normandy, France, June.

Floris van Breugel / Lines adorn the fractured sandstone rocks along the Barnacle (Cirripedia) and Sea snail inhabitated shores of Palos Verdes peninsula, California, USA

David Shale / Heteropod mollusc (Atlanta peroni) from between 195-498m / 640-1634ft, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Snail fish {Careproctus sp} 0 - 1387m, Mid-Atlantic Ridge, North Atlantic Ocean

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

Alex Mustard / Grey bonnet snail (Phalium glaucum) female laying a large mass of orange eggs. This egg mass has been laid by several snails. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Moon snail (Gastropoda) egg mass. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.