Thank u for helping me. I did keep my aldabra close to its heating source inside its enclosure on 2011. So his new growth had injured by the lamp. His new growth had become brown.ALDABRAMAN said:I have seen similar, usually on older adult tortoises. It does look like shell damage. Best to get a culture and determine if it has any secondary issues like fungal or bacterial infections and treat them inorder to allow the shell damage to heal the best it can. Your aldabra looks like it has very nice growth.
Question, is your tort kept close to its heating/light sources inside or allowed to roam a large outside setup with natural sun? I have seen similar shell damage before on young aldabras that are kept inside and think that being too close to heat bulbs might have caused similar issues in other cases.