|©Dan Varner (It is also the cover image of Oceans of Kansas)|
Cretoxyrhina was an Early to Middle Cretaceous shark, nicknamed the "Ginsu Shark," which reached lengths of approximately 20 feet (6.1m); it is difficult to estimate weight of fossilized cartilaginous fish and as such, I do not recall seeing any confident estimates of weight for Cretoxyrhina. The jaws of the Ginsu Shark were, like sharks today, a veritable death chamber with 34 upper and 36 lower teeth approximately
References for today:
Everhart, Mike. "A GIANT GINSU SHARK (Cretoxyrhina mantelli Agassiz) From Late CRETACEOUS Chalk of KANSAS"