"Sardine Run" by G. Lecoeur edged out a competitive field of remarkable images to take National Geographic's 2016 title.
I captured this image during the migration of the sardines along the wild coast of South Africa. Natural predation, sardines are preyed upon by cape gannet birds and common dolphins. The hunt begins with common dolphins that have developed special hunting techniques.
Bonus video from PBS of the phenomenon:
Lecoeur has more wonderful marine life images on their site.
• Nature Photographer of the Year Contest 2016 (National Geographic)