THE GREAT WHITE LIZARD (JOHN CARTER)
Underneath the city of Tjanath, there is a mighty underground cavern housing the River Syl. It is here where the great white lizard lives. With a mouth large enough to swallow a man, it is apparently a fierce predator in this underground world. It has poor eyesight, apparently because of its subterranean existence, and purple blood with a nauseating smell. It (or at least its species) is known about by the people in the city of Ghasta in the Valley Hohr (which the river Syl empties into) as it is seen on murals within the home of the cities Jed.