Solvin Zankl / Portuguese Man-of-War (Physalia physalis) close up of tentacles, Sargasso Sea, Bermuda

Andrew Parkinson / Northern gannets (Morus bassanus) in flight in Force 8 gales above raging seas. Shetland Islands, Scotland, UK, September.

David Shale / Enteropneust worm / Acorn worm (Yoda purpurata) from the North Atlantic Ocean, southern Purple variety, feeds on sea floor sediment leaving behind variable wavy traces, Depth approx 2700m. new spec...

David Shale / Enteropneust worm / Acorn worm (Yoda purpurata) from the North Atlantic Ocean, southern Purple variety, feeds on sea floor sediment leaving behind variable wavy traces, Depth approx 2700m. new spec...

Yva Momatiuk & John Eastcott / Lone hiker walking along the base of a sandstone butte strong pattern of wavy lines in petrified sand dunes are exposed by erosion, Vermilion Cliffs National Monument, Colorado Plateau, Utah

Yva Momatiuk & John Eastcott / Lone hiker walking along the base of a sandstone butte strong pattern of wavy lines in petrified sand dunes are exposed by erosion, Vermilion Cliffs National Monument, Colorado Plateau, Utah

Yva Momatiuk & John Eastcott / Lone hiker walking on colorful sandstone strong pattern of wavy lines in petrified sand dunes are exposed by erosion, Vermilion Cliffs National Monument, Colorado Plateau, Utah

Heather Angel / Daffodil (Narcissus sp) opening, view from above. Focus stacked.

Paul Hobson / Quaking-grass (Briza media) spikelets. Sheffield, England, UK. May.

Ashley Cooper / Reflections of a jetty on the water surface in Lake Windermere, Lake District, England, UK. January.

Fabrice Cahez / Wavy bittercress flowers (Cardamine flexuosa) Vosges, France, April.

Doug Wechsler / Wavy-lined emerald moth caterpillar (Synchlora aerata) which camouflages itself by attaching parts of flower to itself, on Black-eyed susan (Rudbeckia hirta) Morris Arboretum, Philadelphia, Pennsylava...