Behaviour - The primarily nocturnal Titanoboa tend to spend most of its life in or around water. Because of their large size, they appear rather slow and sluggish when travelling on land. Completely the opposite in water, however, Titanoboa are known to have the potential to reach high speeds in all depths of water. They tend to float atop the surface of the water with the snout barely poking out above the surface. When prey passes by or stops to drink, a hungry Titanoboa will snatch it with its jaws (without eating or swallowing it) and coil around it with its body. The snake will then constrict until it has successfully suffocated the prey.
Behaviour - Sarcosuchus spends most of its time submerged in water. It ambushes its preys, drags them into the water, crushes them with its powerful jaws before tearing it apart.
Behaviour - Though perhaps not the biggest creatures that have been brought here, the Utahraptors are certainly amongst the more dangerous. Quick on their feet and in wit, these raptors roam in packs led by a matriarch. A strict pecking order exists within the packs and occasionally, if a low ranking members steps out of line it will be mercilessly ripped apart.
Behaviour - A lone hunter, Carnotaurus distinguishes itself from other dinosaurs through its quick, hatchet like method of biting. Through it may not have had the strength of Allosaur jaws, no other could rival the quickness of Carnotaurus' bite. A solitary dinosaur, most encounters between individuals end in battle.
Behaviour - The juvenile and sub-adult Allosaurus generally stick to the thick forested areas in which they can easily hide, whereas the older, adult allosaurus prefer flat, open terrain to hunt in. Though not as quick as some others, Allosaurus has great stamina and can track down a prey for a long while. Generally a lone hunter, Allosaurus only comes together to bring down massive preys. Though often these feeding frenzies also result in smaller, more vulnerable members being killed. It ain't easy being an Allosaurus.
Amount - Plenty.
Found - Everywhere, but mainly main bubble.
Notes - For those daring to go into the forest, they might see one sub-adult Allosaur limping around. Seems the poor thing has got a broken foot.
Behaviour - The apex predator of the Triassic, it was far larger than any of the dinosaurs that then roamed. This basal archosaur has strong legs and was capable of both quadruple as well as bipedal gait. It vastly prefers to stay on all its feet, though when set to fight either a prey animal or another Postosuchus for territory it'll often rear up on its powerful hind legs with a roar that seems to make the earth shake. It is a slow predator, preferring to injure a prey in ambush and then, if necessary, follow it until it collapses of exhaustion.
Behaviour - Though Batrachotomus comparatively lacks the strength of postosuchus this basal archosaur makes up for it with its superior agility and speed. They prefer to catch their prey quick and from an ambush, tearing flesh apart with their sharp, teeth.
Amount - Several.
Found - Main bubble and pirate ship.
Note - It was not until these basal archosaurs started disappearing from the fossil record that dinosaurs truly started to make their impact on the world.