Thallium

Axanthic is a recessive mutation that removes yellow (xanthin) pigment while leaving melanin intact. The result is a gray, black, and white snake that keeps its normal pattern and dark eyes but loses all warm coloration.

Toffee Belly is a recessive mutation, believed to be related to the T+ albino line, that replaces the normal black-and-white checkered belly with a toffee-gold color. Minor dorsal lightening can accompany the belly change.

Anaconda, often shortened to Conda, is an incomplete-dominant pattern mutation. One copy reduces the normal blotched dorsal pattern, creating a cleaner, more open, simplified appearance — the pattern becomes reduced, broken, or simplified.