Identification: Name That Cacti...

For the resident pros, who can name the cacti in this photo?

 

Because you typed "cacti" I thought you were asking about the entire set. Then I saw the arrow, in which case your question is about the cactus in the photo.

 

Small picture, but I would say Astrophytum myriostigma (or coahuilense, but is less common). It usually does not offset like that, it was probably damaged when young.

 

Thanks, Ron. I thought that too, did not notice the red arrow; no way was I going to attempt the whole set. But I think that one looks like Astrophytum myriostigma.
Astrophytum myriostigma - Wikipedia