Anery is a black and white colour mutation. Anerthrystic, to give it the full name is the lack of red pigment in the colouration of the snake.
Our Anery male is also a Pinstripe Motley, which is a pattern mutation.
Pinstripe Motley is a combination of both Stripe and Motley. (See Articles for a more in depth explanation). It is a fascinating gene to work with.