13 feet (3.9 meters) tall, 20 feet (6.1 meters) long, 1,700 lbs
Sharp claws
Blade-like teeth and horn
USA, North America; Tanzania, Africa
Late Jurassic 159-144 Ma
First appearance: "Bloodiest Battle" Other appearances: "Hunter Becomes Hunted"

Ceratosaurus ("horned lizard") was a large predatory theropod dinosaur from the Late Jurassic Period, found in the Morrison Formation of North America, and Portugal. It's characterized by the blade-like horn on its snout.

Ceratosaurus first made its appearance in "Bloodiest Battle", alongside other Jurassic dinosaurs, and later in "Hunter Becomes Hunted". It also had a cameo appearance in "Cannibal Dinosaur" and "Biggest Killers" episodes, because it was the ancestor of Majungasaurus and its cousins and was mentioned as such.


The 1.5-2 ton carnivore Ceratosaurus stood 13 feet tall and measured 6.1 (20 feet) long. It had a distinctive horn (actually an expanded nasal crest) on its snout and two smaller ones on its brow--its name means horned lizard--and a row of bony plates down the middle of its back. Another horned meat-eating dinosaur was Carnotaurus sastrei, a relative of Majungasaurus and probably the most famous of the abelisaurid family and a possible descendant of Ceratosaurus.

Fighting styleEdit

Being about half the size of its contemporary rival Allosaurus, Ceratosaurus was still a fierce meat-eating hunter. Its four-fingered hands (primitive for theropods) ended in sharp claws and it killed its prey with large blade-like teeth.


Ceratosaurus may have hunted in groups and evidence suggests that it competed with Allosaurus for prey, including herbivores such as iguanodonts, stegosaurs and even the giant sauropods.