Well that wasn't the question not even this weeks question but moving on.
There is evidence that spinosaurus is a meat eater and opposite. For one thing the spinosaurs is a group of fish eaters, Proven since a member, baryonx, was a fish eater and remains of fish scales have been found in its stomach. A characteristic of Spinosaurs is also a large claw on both hands (kinda like a raptor but on its hand) which is thought to have been used to hook up fish. Spinosaurus also had a crocodile like snout which could have been used to catch fish. It was also beleived to swim (but that may be outdated).
However, spinosaurus was a very large dinosaur, if I remember correctly 49 feet long, 14 feet tall, and 7 tons (Real outdated here) (Theories state 59 and 20 respectivly) (T rex was 13 feet tall and 40 ft long and 8 tons, eat that t rex fans XD get it? Eat it?) Now unless it feasted on 50 foot long dinosuchuses (I?) The. It is higly unlikely that would happen. Though the fish were probably bigger back then but then who knows (the paleontologist). Spinosaurus also had a sail, which paleontologist believe was a heating device (THOUGH also thought to be used as a food storage or display). If the spinosaurus' sail WAS used for thermal regulation that would mean it would live in a climate that was very hot or cold, like a desert (hot in the day but very very cold at night, that sand really does take heat doesn't it....) if you are in a desert then you won't be doing alot of fishing (unless you are in a tundra).
Other theories suggest that Spinosaurus was a scavenger, which is supported by its long snout.
Bit of nuetral information here; Spinosaurus was found in Egypt and would live in Northern Africa. What Northern Africa was like at that time I was not able to find.
A little fun fact: Spinosaurus is the longest Theropod known, and the most complete skeleton was destroyed in British museum during a WWII bombing raid. So far only fragments have been found.