Thephotograph, publishedthis weekinScience, was takenby a groupled by Isabelle Krutaof the FrenchNationalMuseum of NaturalHistory, usingatechnique called synchrotronX-ray microtomography.
But the analysis by Kruta and her colleagues indicates their ammonites would have dined on small organisms floating in the water, such as zooplankton, tiny crustaceans, and even other petite ammonites.