Researchers from the University of Chicago have used tools developed to explore 3-D movements and mechanics of modern-day fish jaws to analyze a fossil fish for the first time. Combined with CT imaging technology able to capture images of the fossil while it is still encased in rock, the results reveal that the 335-million-year-old shark had sophisticated jaws capable of the kind of suction feeding common to bony fishes like bass, perch, carp and also modern-day nurse sharks.
Click here for original story, Long before other fish, ancient sharks found an alternative way to feed
Source: Phys.org