The photo is an Astrophytum hybrid.
My friend gave me seeds, Astrophytum hybrid fukuryu and I propagated.
All others are fukuryu but only this one does not show the character of fukuryu.
I assume the gene of khoyou is mixed in because the body colour turns in season.
The current colour is for winter and spring.
The body returns to green in summer.
I have not seen flowers yet.