Camarasaurus was more massive than the more famous Diplodocus but had a shorter neck and tail, relatively long forelimbs and high shoulders, and stood with its back almost horizontal rather than rising to the hips. Wereas Diplodocus had a small, low, horse- like head, Camarasaurus's head was large and deep, with a muzzlemore like a bulldog's.
Big eye sockets, nostrils, and other cavities reduced some skull bones to lightweight struts.
Big skull cavities for the eyes and nostrils suggest that this sauropod had keen senses of sight and smell that would have helped it find new feeding grounds and detect where dangerous theropods lurked. Camarasaurus probably moved around in mixed-age herds. There is no proof for this, but whitout adults to protect it, a young Camarasaurus would have been vulnerable to any hungry Allosaurus or Ceratosaurus . Camarasaurus bones have been discovered deeply scored with the characteristic teeth-marks of Allosaurus and Ceratosaurus . It is possible, however, that these predators were beasts they had not killed but found dead.