Free diver swimming over a pod of sleeping sperm whale, Physeter macrocephalus, Vulnerable (IUCN). The sperm whale is the largest of the toothed whales. Sperm whales are known to dive as deep as 1,000 meters in search of squid to eat. Image has been shot in Dominica, Caribbean Sea, Atlantic Ocean. Photo taken under permit n°P 17-01/02 Fis-4.
Photo and caption by Franco Banfi / National Geographic Nature Photographer of the Year Contest