The Chasmosaurus is an rhinoceros-like quadrupedal herbivore that inhabits FMM UV-32. It has three horns on its head, two large ones behind its eyes and a smaller one above its parrot-like beak, and a big frill behind and protecting its head. Chasmosaurus have clawed feet resembling hooves tipping their sturdy legs. When threatened, Chasmosaurus will charge and attempt to gore its attacker. Chasmosaurus is one of the smaller FMM UV-32 inhabitants, resembling its relative Triceratops.
Chasmosaurus just wanders around the island and occasionally stops to eat. When viewing it in its idle animation from the front, it looks like it is rotating its head. When it senses the hunter, it will try to run away. If it is shot, it will still attempt to run away, but if it feels cornered, it will charge and try to kill the hunter. It's footsteps when running are identical to the Stegosaurus'.
If debug mode is activated and the hunter walks into a Chasmosaurus, the hunter will die even if the Chasmosaurus was not startled. This is because that is their normal reaction when they detect a hunter.
The Chasmosaurus is the only dangerous herbivore in Carnivores 2, and will even attack the player in Observer Mode if he gets too close. In Carnivores: Dinosaur Hunter the Chasmosaurus no longer attacks the hunter.