Scalloped hammerhead sharks, 'Sphyrna lewini', are known to form great schools. But scientists are trying to solve mysteries about them, such as where do they breed and migrate?
Photograph by Jeff Wildermuth, National Geographic CreativeThis scalloped hammerhead shark ('Sphyrna lewini') was photographed off Cocos Island, Costa Rica.
Photograph by Flip Nicklin, Minden Pictures, National Geographic CreativeMarine scientist and National Geographic explorer Pelayo Salinas assesses shark conservation and management in the Galapagos Marine Reserve in Ecuador.
Photograph by Charles Darwin Federation, via National Geographic CreativeHammerheads are among the rich marine biodiversity of the Galapagos.
Photo by Enric Sala, National Geographic Society, Pristine Seas