Aldabra tortoises are one of the largest land tortoises, second only to the Galapagos tortoise. Males can weigh up to 550 pounds, while females can weigh up to 350 pounds. They have a high domed carapace that is dark gray in color. The carapace can reach four feet in length on males and three feet in length on females. Limbs are stocky and covered in bony scales. Neck is long, which aids in food gathering.