The Gulf crayfish snake ("Regina rigida sinicola") is a nonvenomous snake averaging 20 inches (51 cm) when fully grown, with a record of 31.5 inches (80 cm).
The Gulf crayfish snake ("Regina rigida sinicola") is a subspecies of nonvenomous snake endemic to the southeastern United States. It averages 20 inches (51 cm) when fully grown, with a record of 31.5 inches (80 cm).