Dilophosaurus, meaning "double-crested lizard" in reference the two thin crests of bone on the top of its head, was a large-sized theropod dinosaur from the Early Jurassic Period.
The endorsement team was meant to see the Dilophosaurus in its paddock during their tour of Jurassic Park, but no Dilophosaurs revealed themselves to the visitors.
When Dennis Nedry turned off the park's secuirty systems so he could steal InGen's dinosaur embryos, Dilophosaurus was one of the many dinosaurs that were free to roam the island. One such Dilophosaur stalked Nedry himself when he was trying to get his vehicle unstuck out of a fallen tree limb. Feeling uneasy, Nedry stopped rope towing his jeep to face his stalker that was right behind him. Dennis Nedry tried to trick the dangerous dinosaur into fetching a stick for him, but the Dilophosaurus showed little care for the stick outside of the brief sound it made when it hit the forest floor. Angered that his trick was unsuccessful, Dennis Nedry jeered the Dilophosaur before running back to his jeep. But when he was climbing up the hill to get to his vehicle, the Dilophosaurus followed in pursuit and began to spit its venom at Nedry. The Dilophosaur's first attack failed to reach his eyes and its prey increased the pace of his escape only for its next spit managed to hit its target. While Dennis Nedry was wiping the stinging venom from his eyes, the Dilophosaurus went inside his vehicle where it proceeded to kill him once he got into the driver's seat.
No Dilophosaurus were known to have been held publicly in Jurassic World, nor were listed on its official website as attractions, but the Innovation Center included it in its list of holographic dinosaurs, along with Velociraptor, Spinosaurus and other dinosaurs created by InGen but not kept on display in the park. During the second Isla Nublar incident, the holographic display of Dilophosaurus was briefly used by Gray Mitchell to distract the Velociraptor Delta while he, Claire Dearing, Owen Grady, and his brother Zach Mitchell escaped the building.