Answer:Basically, this is a fictional version of the Spinosaurus. Simply because scientists didn't know the Spinosaurus was a fish eater when this movie was made so the movie makers made the Spinosaurus a land hunter. It's possible that the Spinosaurus in this movie hunts for mammals because it doesn't have access to the sea to hunt for fish, or doesn't know how to because it was bred that way.
Answer: Basically, this is a fictional version of the Spinosaurus. Simply because scientists didn't know the Spinosaurus was a fish eater when this movie was made so the movie makers made the Spinosaurus a land hunter. It's possible that the Spinosaurus in this movie hunts for mammals because it doesn't have access to the sea to hunt for fish, or doesn't know how to because it was bred that way.
lionhead