What do you mean by improperly labelled?
The fish being sold may look as right as rain, but if the genetics for some of these traits are carried by the fish that eventually are later bred, some of those traits can & usually will show up in at least some of their offspring. There's no telling what quality of offspring two fish will throw, until you breed them and find out. With most species of cichlids these type of genetic defoties are not something that one generally sees in F1 and/or F2 specimens, even when bred to siblings.
I agree with you. What I meant by improperly labeled was importers, distributors, vendors, etc claiming fish to be f0 or f1 when the fish is f2 or f100. I have seen this done. I do not care to go into that discussion. However like you said about the genetics being passed on and not knowing what you have until you grow it out, is completely true. The majority of deformities should be able to be identified by an inch or so and then should be culled.
