Juan Carlos Munoz / Northern lights / Aurora borealis above clouds over Southern Iceland, Iceland, Europe, March 2012

Tom Gilks / Cyclists, part of 'The Wave' climate change march ahead of the Copenhagen climate summit, slogan on luminous jacket stating 'The zero emission option' London, UK, 5th December 2009

Wild Wonders of Europe / Pitkin / A violet Nudibranch / Sea slug (Flabellina affinis) feeding on hydroids, 'Turtle Rock', Passage du Cavallo, Lavezzi Archipelago, Corsica, France, September 2008

Wild Wonders of Europe / Pitkin / A violet Nudibranch / Sea slug (Flabellina affinis) feeding on hydroids, 'Turtle Rock', Passage du Cavallo, Lavezzi Archipelago, Corsica, France, September 2008

Wild Wonders of Europe / Pitkin / A violet Nudibranch / Sea slug (Flabellina affinis) feeding on hydroids, 'Turtle Rock', Passage du Cavallo, Lavezzi Archipelago, Corsica, France, September 2008

Wild Wonders of Europe / Pitkin / A violet Nudibranch / Sea slug (Flabellina affinis) feeding on hydroids, 'Turtle Rock', Passage du Cavallo, Lavezzi Archipelago, Corsica, France, September 2008

Martin Gabriel / Jellyfish tank at Parque Oceanográfico, Valencia, Spain, 2008

Francis Abbott / Giant moray eel (Gymnothorax javanicus) and shoal of Luminous cardinalfish / Glassfish (Rhabdamia gracilis), Similan Islands, Thailand.

Francis Abbott / Bluering angelfish (Pomacanthus annularis) with a shoal of Luminous cardinalfish / Glassfish (Rhabdamia gracilis) shelter within a small cave from the strong currents that sweep Ko Tachai island in th...

Francis Abbott / Bluering angelfish (Pomacanthus annularis) with a shoal of Luminous cardinalfish / Glassfish (Rhabdamia gracilis) shelter within a small cave from the strong currents that sweep Ko Tachai island in th...

David Shale / Viperfish {Chauliodus sloani} deepsea, from the Mid-Atlantic Ridge, 400-520m, during the day

David Shale / Snaggletooth {Borostomias sp} deepsea fish with luminescent snare, from the Mid-Atlantic Ridge