The krayt dragon was a large carnivorous reptile native to Tatooine. Krayt dragons grew continuously throughout their lives to an average length of 45 meters and weight of 20,000 kilograms. They could live to be 100 years old and did not weaken appreciably with age. An ancient krayt dragon was the oldest and biggest of all krayt dragons. They could be found on the highest mountains of Tatooine.