MARTIN BOND / SCIENCE PHOTO LIBRARY MARTIN BOND / SCIENCE PHOTO LIBRARY
Sand ripples. Sunlight being reflected from wet sand ripples at low tide. The ripples are made by the action of waves of water. Amongst the ripples are piles of faeces from lugworms, Arenicola marina. Lugworms live beneath the surface and filter the sand for organic particles. Photographed at Morecambe Bay in Lancashire, Great Britain. A vast expanse of sand is exposed here at low tide and the area is one of the most important feeding areas for wading birds in northern England.
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