Nick Upton / Dyer's greenwood / Dyer's broom (Genista tinctoria) flowering in chalk grassland hillside meadow, Wiltshire, UK, July.

Juergen Freund / Squirrelfish {Sargocentron sp} Caribbean sea

Juergen Freund / Lined sweetlips {Plectorhinchus lineatus} Great Barrier Reef, Australia

Juergen Freund / Smooth trunkfish {Lactophrys triqueter} Caribbean sea

Roberto Rinaldi / Diver above a rock covered by different types of colourful encrusting sponges and sea urchins, Gozo, Malta. Model released.

Roberto Rinaldi / Detail of a Gorgonian sea fan (Gorganacea sp.) structure, Great Barrier Reef, Australia

Roberto Rinaldi / Close-up of a soft coral branch (Dendronephthya sp.), Great Barrier Reef, Australia