One of the interesting finds in England has been the bones and scales of fish found in the stomach area of Baryonyx fossils. This seems to positively identify Baryonyx as a fish eater (piscivorous) as believed. One view of how they hunted is that they hunted in the following manner:
waiting on riverbanks, resting on its forelimbs until a large fish such as Lepidotes (which was found in the belly of the type specimen in Surrey) swims past, then scoops it up with its large thumb claw. There were also Iguanodon bones in the stomach, so it may have attacked or scavenged them too. It walked on two legs.