Champsosaurus is an extinct genus of diapsid reptile belonging to the order Choristodera.
It grew to about 1.50 m (5 ft) long, though C. gigas, the largest species, reached 3-3.5 m (10–12 ft) in length. Champsosaurus vaguely resembled a gharial and, like gharials, it was primarily aquatic, catching fish with its long, tooth-lined jaws. It probably swam with lateral body movements, pinning its limbs against its body to increase its streamline, just like crocodiles and the Marine Iguana. Behind the eyes, Champsosaurus's skull was very wide, where powerful jaw muscles were attached. It was so specialized to life in the water that only females could come ashore to lay eggs, while males could not move on land.
Champsosauruses appear in this video game as predators that can be combated against.
In the park attraction, a fossilized Champsosaurus skeleton is among the fossils in the ride queue's exhibits.