A/N: since it's more likely than unlikely that the spinosaurus in jurassic park 3 is a hybrid, due to the many recent information on the masrani website as well as the dinosaur protection group, I decided to try and find out just what kind of hybrid the spino could be and here's what I have.

Spinosaurus would obviously be the base gene of the creature. Because, well, spinosaurus.

The Baryonix contributed to the added size anf agressiveness. As seen in Fallen Kingdom when it first showed up, it showed levels of aggression towards Clair and Franklin. Not to mention, that it sounded a bit similar to the spinosaur's roar we're talking about. So some of the roars of the creature were contributed to it as well.

The Suchomimus also contributed for it's size as well (not sure if it was an agressive creature like it's smaller memeber of the speices). Characteristics of it's snout and head were also contributed on the spinosaurus, hence why it's facial features are different from the skeleton specimen we see on mainstreet in jurassic world. Also, in jurassic world evolution, it possess some similar to the spino's as well.

Both also contributed a more upward stance for the creatures as well where it moves like the two.

Crocodile would be likely. The look of the spino's eyes are more remonisant to a croc than any of the other dinosaurs in the series. It's agressive natrue as well would be contributed to the spino as well as it also being a swimmer to contribute to the spinosaur's already well known swimming abilities. Lastly, it's armored plating would also be contributed as well, giving reason to why it was able to survive from not just being bittin on the neck, but slammed to the ground and then dragged around a bit by the sub adult rex.

The Cassowary is another animal who's agressiveness contributed to the spinosaurus. However, it's powerful legs did as well, giving the large therapod more speed when running.

This last one is a maybe. I believe that the Tyrannosaurs Rex's DNA contributed to the bite force of the spinosaurus. When the spino bit down on the Sub Adult's neck, it bit down hard and it's jaws were really in deep. It didn't let go until it crushed and snapped the neck of the sub adult. But, that's only a possibility and it could be attributes of the other creatures giving it increases jaw strength.