X-ray of a hammerhead shark

Last week, scientists described a new species of hammerhead shark, the Carolina hammerhead. Though slightly smaller than the scalloped hammerhead species it was previously thought to be a part of, the Carolina hammerhead was ID'd as something different with the help of DNA samples, not visual descriptions. This, courtesy shark blogger David Shiffman, is the Carolina hammerhead's head, in beautiful x-ray vision.