Hmmm... I'm not convinced that they are lenticulata. Looks an awful lot like a strigata. I've seen pics of what was labeled a red back strigata that looks very, very similar to what you have.
Even when large, lents have dark, very distinct spots along the body that do not fade out. Yours look like depending on mood will have the body markings come and go.
Do you have both fish pictured or just multiple pics of the same fish?
Regardless they are awesome fish and I'd say that if they are the strigata you have a much rarer fish that I'd love to have!!