Spinosaurus is not known from complete skeletons. The size estimates I am aware of say that Spinosaurus was about 49 feet long. I doubt that they grew to be as long as 66 feet.

BIG

Richard Markgraf discovered a partial skeleton of Spinosaurus at the Bahariya Formation in Egypt in 1912. Since then, Spinosaurus fossils have been found not only in Egypt but also in Morocco.

At Shoulder: about 17 ft

Sail: 5 ft

Total: 21 ft

Spinosaurus lived in North Africa from Morocco to Egypt between 112 and 97 million years ago. The climate there was tropical, and the landscape was a coastal tidal plain with mangrove swamps. Spinosaurus was adapted for a piscivorous, or fish eating, lifestyle because of its long, narrow jaws filled with narrow, interlocking teeth.

Spinosaurus was larger, but the Tyrannosaurus is much stronger.

Although Spinosaurus jaws were weak they were still capable of biting and killing another animal. Spinosaurus also had very large, strong forlimbs with sharp claws that were meant for fishing, but could also be used as very deadly weapons.

This fight is most likely 50/50.

To solve this problem, we must first look at the combatants.

Tyrannosaurus

Weight: 6.4 tons

Length: 12.8 metres

Weapons: Bannana-shaped serrated teeth that could break through bones and an 8 ton bite force.

Advantages: Stronger bite force, probably more agile, larger brain.

Disadvantages: Much smaller, its arms were very small and weak, and it could probably take less wounds.

Spinosaurus

Weight: 12 tons

Length: 18 metres

Weapons: Long, deeply rooted teeth, a 3-5 ton bite force and long, hook-like claws on flexible arms.

Advantages: It was much larger, and its weak spots (head and neck) would be out of the reach of its opponent. It was more muscular and likely could take more damage.

Disadvantages: Slightly weaker bite force, and the fatty hump on its back would make it slightly less flexible.

The fight is almost completely balanced.

My opinion: Personally, I think the t-rex would have won because the spino. usually hunts for fish rather than dinosaurs while the t-rex regularly hunts, and also if spino falls, he dies because spino's spine is connected to the fin.

Spinosaurus is estimated to have been 49 feet long. The weight estimates are far more sketchy, though, as we don't even know Spinosaurus from any complete skeletons. They range from 4.4 to 10 or even 18 tons.

Spinosaurus lived in North Africa from Morocco to Egypt between 112 and 97 million years ago. The climate there was tropical, and the landscape was a coastal tidal plain with mangrove swamps. Spinosaurus was adapted for a piscivorous, or fish eating, lifestyle because of its long, narrow jaws filled with narrow, interlocking teeth.

Spinosaurus was carnivorous, and had a diet based mostly on fish, using its long, crocodile-like jaws to scoop fish out of the waters easily. However, such a large dinosaur could not survive simply on fish, (although there were some that grew up to six feet long at that time) and most likely fed on other dinosaurs. In addition, this dinosaur's spine may have been fragile, and it would have been careful when hunting other carnivores; if it ever did so.

In summation, Spinosaurus was not a herbivore.

Spinosaurus primarily ate the fish that lived in local swamps. They would wade into a swamp and then possibly submerge their jaws in the water, because their jaws may have had pressure sensors for detecting fish that the Spinosaurus couldn't see. When a fish came within reach, they would strike, and then swallow the fish whole. On occasion, they probably hunted small herbivorous dinosaurs and scavenged on large dinosaurs.

A spinosaurus is much larger than the baryonyx

If you think of it no. In JP3 spinosaurus was 9 tons, but it was a fish eater. How can you get to 9 tons on fish. Second when Trex had a grip on spinosaurus it would be over. Trex has slightly curved teeth that have bacteria all over it. Even if spinosaur escaped it would die from infection. That would unlikely happen because trex has bone crushing jaws and spinosaurus has hollow bones for catching fish. One bite from rex and x.x

It's very doubtful that Spinosaurus lived in herds. One reason I say this is, because Spinosaurus was primarily a fish-eatter and a single river would probably not have enough fish to support a large number of Spinosaurus. The only time Spinosaurus would have lived together was during the mating season.

Well its quit simple considering Spinosaurus means "Spined lizard" a.k.a the sail coming out of its back. its sail is made from huge pillers or spines jutting out of its back with skin ataching its spines together to form a sail. Kinda obvious...no offence... hope it helped :)

As the spinosaurus was big and bulky it meant that it will take longer to walk.

The spinosauraus was arguably bigger than the T Rex. The sail on its back would not be good because as soon as its sail hit the ground it would break its back and die. Spinosauraus was much larger than the gigantaraptor.

Spinosaurus was about 17-20 feet, although including the sail it would be 20-25 feet.

No Spinosaurus and T-Rex did not live in the same place.

There have only ever been 6 specimens of Spinosaurus found to date. They have all been found in different locations in North Africa (Morocco, Egypt, Kenya, Libya and Niger)

All specimens of T-Rex have been found in the Western Part of North America. Some other Tyrannosaur species have also been discovered in Canada and Alberta.

Also although both lived in the late Cretaceous they were separated by some 25 million years. Spinosaurus lived much earlier than T-Rex. Spinosaurs lived from 97 million years ago compaired to T-Rex which lived 66,000,000 years ago.