The Ba Snake, also known as a Xiu Snake (修蛇 xiū shé), is a beast from the Classic of Mountains and Seas.
Ba Snakes are so large they can swallow an elephant whole. After three years, they spit out the bones. Ba Snakes can be cyan, yellow, or black, though there are records stating Ba Snakes have a black body and cyan heads.
If a talented and/or virtuous person were to consume the flesh of a Ba Snake, they cannot be ailed by heart or stomach pains.