Moon Cactus plants are known as Gymnocalycium mihanovichii or Hibotan cactus.
This Cactus actually gets its unique features because it lacks the ability to produce chlorophyll, which means it must be grafted onto a rootstock with that ability.
Plants are constantly growing, ever-changing, and therefore unique. The plant you see in the photo is an example of the plant you will receive. Pots shown in the pictures are sold separately. Purchases of the plant without separate purchase of a pot will come in a black plastic "grower's pot".