Indominus Rex

The Indominus rex was a genetically modified hybrid dinosaur and a major antagonist in the Jurassic Park franchise, serving as one of the two main antagonists (alongside Vic Hoskins) of Jurassic World, a major antagonist in the Netflix series Jurassic World: Camp Cretaceous (specifically as the secondary antagonist of Season 1 and a posthumous antagonist for the rest of the series), the posthumous overarching antagonist of Jurassic World: Fallen Kingdom, and a posthumous antagonist in Jurassic World: Dominion. In the first Jurassic World film, she was going to be the latest attraction added to the park for higher profits. The hybrid was created by modifying the genome of a Tyrannosaurus rex with the DNA of various other theropods. Some of the known species that were included were Velociraptor, Carnotaurus, Giganotosaurus, Majungasaurus, Rugops, Pycnonemosaurus, Quilmesaurus, Viavenator, Deinosuchus, and Therizinosaurus.There were also the DNA of modern animals such as cuttlefish, tree frog, and a pit viper snake. The genome of Tyrannosaurus rex was used as the base genome for the hybrid, with the rest of the genome being classified. It also gave the Indominus rex an incredibly strong bite that could crush bulletproof glass. Velociraptor DNA was added for high levels of intelligence and the ability to make plans and decisions. Giganotosaurus DNA was added for the large size of the Indominus and the head shape. It was mentioned that the Indominus rex would be larger than the T. rex when fully grown. Including the shape of the head in some parts from the Giganotosaurus, abelisaur genes (Carnotaurus, Majungasaurus, Rugops, Pycnonemosaurus, Quilmesaurus, and Viavenator) were added to act as a biological form of armor that absorbed most of the incoming attacks. Deinosuchus DNA was used to form the crocodilian teeth of the Indominus that were used in grasping the flesh of opponents. Therizinosaurus DNA added the presence of long forelimbs with strong, slashing claws. One swipe of the hybrid's claws would take down any specific opponent. Cuttlefish genes were intended to help the Indominus withstand an accelerated growth, but it also added chromatophore cells in the skin so it could change the shape, color, and texture of its skin like a cuttlefish. Tree frog DNA was added for the Indominus to adapt to the tropical climate of Isla Nublar, but it instead added the ability for the animal to remove her thermal signature, which confused the heat-based infrared cameras. Lastly, pit viper snake DNA added special cavities in the skull that allowed her to see infrared vision, which helped her see the heat coming from her prey in dark areas. Said DNA also gave her the ability to open her mandibles and jaws as wide as a viper, specifically at around 90 degrees, such as when she tried to kill Zach and Gray Mitchell while they were trapped inside of a Gyrosphere.

Updated September 23, 2026