The Red Dragon is a mob planned by Notch for a future update. It is currently unknown whether Red Dragons will be hostile, passive, or tamable, but it can be guessed that they will either be hostile mobs or tameable mobs. These dragons will not destroy terrain like the Enderdragon, and will be less dangerous. They will likely appear in the Xbox 360 version of Minecraft as well as the original. Red Dragons would be very rare, and, if the mobs are tameable, they would probably be used primarily as a mode of transportation.