Alex Mustard / Flamingo tongue (Cyphoma gibbosum) feeding on a seafan (Gorgonia ventalina) Cyphomas feed on corals and concentrate the toxic chemicals into their mantle, which they then wrap around the outside of it...

Wild Wonders of Europe / Banfi / Keys simnia (Neosimnia spelta) on a Yellow gorgonia (Eunicella cavolini) Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009

David Shale / Deepsea heteropod mollusc (Carinaria lamarcki) from between 188m and 74m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea heteropod molluscs (Carinaria lamarcki) from between 188m and 74m, Mid-Atlantic Ridge, North Atlantic Ocean

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

Juergen Freund / X-ray of shell of the Venus Comb Murex {Murex pecten}

Juergen Freund / X-ray of shell of spider conch {Lambis chiragra}

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