The jaws of Spinosaurus are narrow and crocodile-like, and the teeth are straight and not serrated like those of Tyrannosaurus. This feature is very similar to the theropods Baryonyx and Suchomimus, both of which were probable fish-eaters.
Spinosaurus is known only from fragments, the first specimen was unfortunately destroyed during World War II. It is estimated that the beast was collosal, perhaps measuring 50 feet in length, but these are only estimates. It seems that although the creature may have been longer than Tyrannosaurus, it had a more slender build.
Pound for pound, both relatively and absolutely, Tyrannosaurus rex is the more formidable animal, despite what the movie Jurassic Park 3 depcits. T.rex would be heavier, more powerfully musculed, and have a much stronger bite than Spinosaurus.
Spinosaurus was relatively obscure among the general public until it was featured in the film Jurassic Park III, where it replaced the T-Rex as the film's primary antagonist, appearing on JPIII's logo and and killing one in a breif fight near the beginning of the film. This defeat, however, did little to sway the popularity of T-Rex; indeed, many fans reacted negatively to the outcome of the fight. Dinosaur fans often debate the true outcome of such a battle, though in reality it could never take place due to the Spinosaurus and Tyrannosaurus living on different continents and existing millions of years apart from eachother. It is generally thought that the Tyrannosaurus' superior jaw strength would give it an advantage in such a battle.
However, the depiction of the Spinosaurus in JPIII as an unstoppable superpredator was inaccurate. Its delicate, bony dorsal fin and long, gator-like snout armed with straight, peglike teeth (as opposed to the ribbed, serrated fangs of theropods such as T-Rex), indicate that this beast was a specialised icthyovore as opposed to a hunter of large dinosaurs, growing massive on a diet of fish, as well as pterosaurs, crocodiles and just about anything else it could swallow whole.
Spinosaurus is closely related to Baryonyx and Suchomimus, but not to the similar looking Dimetrodon, which lived before the age of the dinosaurs.
Spinosaurus is a specialised fish eater.
Spinosaurus was also shown in the movie Jurassic Park 3. Being depicted as a much more stronger, smarter and larger dinosaur then its past star, Tyrannosaurus. Spinosaurus was also seen defeating the notorious T. Rex. Although the depiction is false due to the fact that both carnivores never met in real life. Spinosaurus had many fragile bones. Its long sails and crocodile-like snout were not as strong as it seemed to be in JP3.
Many JP Fans have been debating over which was better if the the two ACTUALLY met in real life. Though Tyrannosaurus Rex would've won if it fought the huge Spinosaurus. Tyrannosaurus was built for hunting medium-sized animals. Spinosaurus was built for eating fish, and the chances of it winning are 1.5%/97.5%. Because of this the dinosaur wasn't adapted to hunting and spent most of his life wading in water and catching fish.
2. The idiot dinosaur that starred in Jurassic Park 3, and took the place of the tyrannosaur.
3. Any dumb moron who does things without thinking.
4. Brainless wonder.
2. Did that Spinosaurus just break it's neck?
3. Loser. You could have thought about that before you did it. Spino.
4. Did that Spinosaurus just walk into a tree?