The issue with the fronts here is they are not allowed to be imported so the highly inbred burundi we do have with all the broken bars and random barring that pops out is all we can legally get..
I know what you are saying with the yellows, but I also thought there was a naturally occurring strain of white Labidochromis caeruleus, same with how there are blue ones (caeruleus is somehow latin for blue). I think it is very possible the white maybe caused by inbreeding but it could well be the naturally occurring ones..
It is good to know how to tell the fronts apart although I doubt most of us will see any others in NZ.. What would you call a burundi that sometimes throws 7 barred babies?