Norbert Wu / Bigeye Trevally (Caranx sexfasciatus) school form a moving circle, Borneo

Yva Momatiuk & John Eastcott / Sand dunes of fine gypsum particles textured by wind and hiker's footprints, changing winds form cross-grooves, evening, White Sands National Park, New Mexico

Fred Bavendam / Coral Grouper (Cephalopholis miniata) exhibiting an unusual pale coloration pattern at dusk, Bali, Indonesia

Colin Monteath / Newly formed sea ice rafting together to form ice floes, McMurdo Sound, Ross Sea, Antarctica

Colin Monteath / Newly formed sea ice rafting together to form ice floes, McMurdo Sound, Ross Sea, Antarctica