The Indominus Rex, often shortened to I-Rex, is the hybrid dinosaur created for Jurassic World in 2015 as the park's new attraction and main antagonist. Its vocalisations were designed from layered animal recordings to sound larger and less familiar than a T-Rex. Clips of the growls spread through soundboards and editing communities, where this second growl became a reusable cue for dinosaur attacks, monster teases and creature reveals far beyond the film itself.