Length: 42 feet (Male), 43 feet (Female)
Height: 16 feet (Male), 17 feet (Female)
Weight: 7 tons (Male), 8 tons (Female)
- Males: Blue and beige mottling, purplish hue traveling from the crests down to the back and tail. Stripes similar to the base color running smoothly along the back and sides between the hip and arms are seen in some individuals.
- Females: Brownish grey mottling with a weak blue-purple hue. Stripes similar to the base color running smoothly along the back and sides between the hip and arms are seen in some individuals.
- Juvenile (both sexes): Dark grey covered in thin dark stripes that fade through adulthood; some still carry faint to fairly visible traces of the stripes.
Diet: Most prey, but are mostly partial and adapted to hunting sauropods.
Preffered Habitat: Like Tyrannosaurus, Giganotosaurus is not partial to one type of habitat, establishing territory in both dense forests and open plains. It roams wherever their prey may gather, such as the Game Trail or the River.
Social Structure: Solitary, however Giganotosaurus will form temporary packs with others of its kind, forming alliances with individuals that it can trust during hunts.
The Giganotosaurus rivals Tyrannosaurus for size and ferocity, and it is an extreme competitor of the latter. Its behavior and hunting techniques differ from Tyrannosaurus in that it is more tolerant of others of its own kind, allowing Giganotosaurus to form small to medium-sized packs to hunt large prey. These packs have no real hierarchy, although the largest individuals dominate over the smaller ones and have priority over a kill.
Giganotosaurus is a powerfully-muscled predator, although it is not particularly a fast runner like its close relative, Allosaurus. With sauropods being its principle prey, it does not need speed to help it hunt, instead using its strength and pack force to bring down large prey. Fights among pack members are common, especially over food, and cannibalism can occur between larger individuals over smaller ones when prey is scarce. Lone individuals use ambush techniques to catch hadrosaurs, this being where conflicts with Tyrannosaurus and Acrocanthosaurus are most likely to occur.
Giganotosaurus' teeth are slightly smaller than the teeth of Tyrannosaurus and are more fragile. Like Allosaurus, Giganotosaurus has jaws that can open to an incredible degree, making these predators very efficient hunters and devourers. After eating their fill, a pack of Giganotosaurus will rest around the carcass to guard it from other carnivores, refusing to leave until every scrap of flesh has been consumed. This contrasts to Allosaurus, which, after making a kill, eat their fill and disperse soon afterwards.
Giganotosaurus are possibly the only large theropods capable of hunting Brachiosaurus, due to its massive size and pack-hunting capabilities. However, Tyrannosaurus rex packs have been found attacking Brachiosaurus.