The Canopus III dinosaur was a dinosaur species native to Canopus III. It lived in a desert environment.
The dinosaur appeared to gather strength from being hit by Starfleet phasers on stun. However, the underside of its neck proved to be a weak point.
At some point before 2269, James T. Kirk witnessed such a dinosaur while on Canopus III.
At least one specimen was in the collection of the Lactra VII zoo. (TAS: "The Eye of the Beholder")