Among about 20 species recovered on the Grignone mountainside (Italian Alps), comprising fishes, crustaceans, and bivalves, the prominent ones are the fishes Saurichthys costasquamosus and Ctenognathichthys bellottii. The first was one of the largest predators of his time, a highly specialized one among his peers judging from its specific teeth and the peculiar scales. The second had comb-like jawbones, with long and slender teeth, adapted to feed on algae. Here one long Saurichthys contains the remains of Ctenognathichthys in what were once the predator's guts. Field and laboratory activity is what is behind the discovery, as it is explained by Andrea Tintori and Stefano Rossignoli of the University of Milano.