Giganotosaurus was a giant theropod dinosaur from Late Cretaceous South America, rivaling Tyrannosaurus rex in size. Because no real recording can exist, roars for it in games, documentaries and edits are entirely designed sounds, typically built from big cat and elephant layers pitched down. This style of roar spread online through dinosaur videos, survival games and soundboards, where creators reuse it as a generic apex predator sound for any oversized carnivore reveal or roaring creature meme.