The distinctive form of a winghead shark, Eusphyra blochii, is revealed by an X-ray image. The shark's eyes are spread far apart, giving it superb binocular vision. Scientists in the Division of Fishes at the Smithsonian's National Museum of Natural History use X-ray images, like the one shown, to study the complex bone structure and diversity of fish without having to dissect or damage the specimen.

The National Museum of Natural History is currently exhibiting "X-Ray Vision: Fish Inside Out," a temporary exhibit that showcases fish evolution and diversity through 40 black and white X-ray images prepared for research purposes. Experience the exhibit at the Museum until August 5, 2012 or online on the Encyclopedia of Life. 

For more shark-appreciation, visit 5 Ways to Revere, Not Fear the Shark, our blog The Spin on Sharks, and learn more about the great white shark in our Great White Shark featured story.