Jurassic Park Wiki
Movies   Games   Toys    
Jurassic logo

This article contains information taken from the (removed) Jurassic Park Institute site

Ceratosaurus was a medium sized carnivore that lived at the same time as the larger Allosaurus, in the Late Jurassic period. However, it also lived some millions of years before the emergence of the successful allosauroids, being of the more primitive four fingered Ceratosauria. What makes it different and distinctive is the large horn on top of its nose and the two horns over its eyes. The use of it has been debated and is most likely used for display (it can be hypothesized that keratinor soft tissue covered the horns), a weapon, or a special used for courtship battles. About 100 years ago, when it was first discovered, it was one of the most well-known dinosaurs. Other unusual features is that Ceratosaurus had a row of osteoderms running along its spine to the tail and four fingers on its hands, instead of the more common three among the other large meat-eaters during its time. This is typically an indication that this theropod is relatively primitive, whose ancestral relatives are from the earlier times of the Mid Triassic to Mid Jurassic periods when coelophysoideans and ceratosaurians were much more prevalent. Allosaurids and megalosaurian carnosaurs, both kinds tetanurans, were much more advanced, with greater speed and intelligence, as well as the ability in at least allosaurids to form packs.

It is probable that the Ceratosaurus ended up being sidelined by the Allosaurus in North America, as evidenced by the fact that Ceratosaurus is the rarest fossil theropod genus present in the magnificent Cleveland Lloyd Dinosaur Quarry. It probably became a prowler of the forest, using its terrifying dentition when ambushing smaller dinosaurs.

This information is given about Ceratosaurus in Jurassic Park: Explorer:

  • Ceratosaurus - smaller and more bird-like than its cousin Allosaurus.
  • Ceratosaurus was named for the single horn on its snout.
  • It was probably more of a scavenger, but may have also hunted aquatic prey.

Wikipedia has a more detailed and comprehensive article on Ceratosaurus


Ceratosaurus, like other theropods cloned by InGen, exhibited pronated wrists. There were two distinct variants of the cloned Ceratosaurus. One variant had a bright red head and a white body with black striping, while the other variant was a monotone gray color. The only known individual observed had small horns over its eyes, resembling those of a Ceratosaurus juvenile. Interestingly, it also possessed a longer and more pointed nasal horn, similar to that of a Triceratops, as opposed to the rounded bump-like horn seen in the original Ceratosaurus.

In terms of size, the cloned Ceratosaurus specimens were considerably larger than the original species. Instead of the typical height of 2 meters and length of 7 meters, these clones reached heights of 3 meters and lengths of 9.2 meters.


The Ceratosaurus, a carnivorous dinosaur, was in close proximity to the river bank where humans were present. However, due to the strong scent of fecal matter in the vicinity, the Ceratosaurus was deterred from pursuing its hunting instincts. The unpleasant odor emanating from the excrement acted as a deterrent for the dinosaur, causing it to abandon its intention to hunt for prey.

Ceratosaurus has exhibited predatory behavior by targeting campers and juvenile individuals as potential prey. Similar to typical predators, Ceratosaurus engages in pursuits, actively chasing its prey and continuing the search even after losing sight of them. This behavior aligns with the natural instincts and hunting strategies commonly seen in predatory species.

An individual Ceratosaurus was observed displaying fear in response to the presence of fireworks set off by poachers. This unexpected reaction suggests that the Ceratosaurus, typically considered a formidable carnivore, can be sensitive to certain external stimuli, such as loud noises and bright lights.

Additionally, another Ceratosaurus was observed engaging in a rather peaceful behavior, coexisting harmoniously with herbivorous dinosaurs. This surprising behavior contradicts the conventional notion that Ceratosaurus solely preys on other animals. Instead, this particular individual demonstrated a non-confrontational attitude, even while being watchful of nearby campers, as it visited a watering hole for a drink.

Ceratosaurus are shown to camouflage within their environment on Isla Nublar.



Ceratosaurus was successfully recreated by InGen in the Embryonics Administration lab on Isla Sorna in secret after the acquisition of InGen by Masrani Global Corporation and after the passing of the Gene Guard Act, alongside Corythosaurus, Spinosaurus, and Ankylosaurus.[2][3] The only known Ceratosaurus was parented and fed in captivity until InGen abandoned the lab and released it into the wild.

Being bred illegally and long after the Isla Nublar Incident, it was not planned to be an attraction in Jurassic Park.[4]

In the wild[]

After being cloned and experimented on for a period of 9 months in the late 90's, the unnamed InGen personnel set the dinosaur free alongside the other illegally bred dinosaurs.[3]

Being created illegally and against the knowledge of InGen or Masrani higher ups, it is unknown if the Ceratosaurus and the other new dinosaurs were affected by or were even bred to include the lysine deficiency that affected the original dinosaurs. It is also unknown how many Ceratosaurus lived on the island, but the one known specimen was known to live in the northern portion of the island.[2]

Jurassic Park III[]

Rescue of Eric Kirby[]


A Ceratosaurus was found on a riverbank by the survivors of the 2001 incident on Isla Sorna.

A Ceratosaurus encountered Dr. Alan Grant and the Kirby family on a riverbank when they were digging through Spinosaurus dung in search of a satellite phone. At first, the humans thought it would attack them, but instead, it walked away from the scene, having been deterred by the Spinosaurus dung that was on them.[2]

Jurassic World: Camp Cretaceous[]

Season 2[]

The Watering Hole[]
Ceratosaurus in the series

A Ceratosaurus came face to face with Darius and Kenji in a watering hole.

A population of Ceratosaurus was held on Isla Nublar for InGen's dinosaur park Jurassic World.

After escaping a territorial Stegosaurus, Jurassic World Incident survivors Darius Bowman and Kenji Kon encountered a Ceratosaurus, which ignored them but in order to drink at a watering hole.


That night, the entire group of survivors was attacked by a Ceratosaurus until it warded off by a flare shot by Mitch and Tiff.

Season 3[]

View from the Top[]

A Ceratosaurus was killed by a hybrid dinosaur in Isla Nublar, the Scorpios Rex.

In the midst of a dimly lit, misty environment, a Ceratosaurus lurked stealthily within the dense undergrowth. Its dark coloration allowed it to blend seamlessly with its surroundings, making it virtually undetectable as it patiently stalked its unsuspecting prey - a group of campers. However, little did the Ceratosaurus know that it, too, would soon become prey to the formidable Scorpios rex.

Season 4[]

Rude Awakening[]

Yasmina had a trauma-induced nightmare in which a Ceratosaurus, the Indominus rex, Toro, and the Scorpios rex surrounded and killed her.


Mantah Corp captured a Ceratosaurus from Isla Sorna and brought it to their island and kept within the island's holding pens. This Ceratosaurus was released after a Sino-Spino hit an electrical panel and caused a small blackout. The Ceratosaurus attacked Sammy Gutierrez, Yaz, Ben Pincus, Brooklynn, the Sino-Spinos Angel, Rebel, and Firecracker the Brachiosaurus, stalking the group and chasing them until they managed to lock a door between them and the theraopod. When Darius and Kash D. Langford went down to the holding pens and nursery to see what happened, the Ceratosaurus attacked them and forced them to escape into and wait in an elevator until a BRAD-X tranquilized the dinosaur.

Season 5[]

Clean Break[]

While collecting DNA samples for Lewis Dodgson, Mae Turner and Hawkes are attacked by a Ceratosaurus which is quickly anesthetized by Hawkes.

Post Isla Nublar Incident (2015)[]

By the year 2018, Ceratosaurus had apparently been subjected to cruelty.[5] None were encountered during 2018, so they quite possibly fell back into extinction. However, there is a chance that some specimens were taken off Isla Nublar.


Jurassic Park III[]

Jurassic World: Camp Cretaceous[]


Behind the scenes[]


Jurassic Park III Ceratosaurus concept art.

In the script for Jurassic Park III Carnotaurus was originally supposed to be the dinosaur that the group encountered at the Spinosaurus dung site.[6] This could be why the Ceratosaurus in Jurassic Park III has a color scheme similar to the Carnotaurus in Disney's Dinosaur that was released a year before. Its color scheme is also similar to Ceratosaurus in the toy line Die-Cast: Jurassic Park (see the "Toys" tab for a picture). In Jurassic Park III, the Ceratosaurus was a modified T. rex model according to model supervisor Ken Bryan on the DVD commentary.[citation needed]


  • The Jurassic Park III Ceratosaurus color scheme also seems to have been used for the Level 30 Ceratosaurus in Jurassic Park: Builder (see the "Games" tab for a picture).
  • A base form Ceratosaurus in Jurassic World: The Game looks similar to a base form Carnoraptor (see the "Games" tab for a picture).
  • In the Netflix show, Camp Cretaceous (Season 2), it is the first time that a Ceratosaurus finally attacks and chased the campers.
  • It is unknown what had happened to the Ceratosaurus from Jurassic Park III, it is likely that it was taken to Mantah Corp Island, however, this is highly unlikely considering there may have been multiple Ceratosaurus on Isla Sorna.


  1. 1.0 1.1 Jurassic Park III poster.
  2. 2.0 2.1 2.2 Jurassic Park III
  3. 3.0 3.1 Dinosaur Protection Group Article on the Gene Guard Act. Contains leaked InGen files.
  4. Ceratosaurus is not seen on the Jurassic Park brochure.
  5. 329F9EC3-8927-401F-AB2A-1CC8A9F698B4
  6. Jurassic Park III film script: Scene 101