Mark witton says that it, based on the beak, was an excepton among pterosaurs... ONE OF THE MOST DYNAMIC IMAGES IN THE BOOK: THALASSODROMEUS PORTRAYED AS A HEFTY BADASS THAT CAN HUNT AND KILL SMALL DINOSAURS (LIKE THE JUVENILE SPINOSAURID SHOWN HERE). . You can see the image in Mark Witton's pterosaur book.