Actually, the problem is failure of hobbyists to selectively breed their Kribs. Back in the 80s, Jim Langhammer noticed that there was quite a bit of variability in Kribs, and started breeding for fish with more spots in the dorsal fin. He was successful in getting a strain that had almost the entire dorsal of both sexes filled with large ocelli. But people are often just so tickled that they got the fish to breed, they don't think about selecting the best color/finnage/etc. for future breeding stock. I believe the greater percentage of Common Kribs in the US hobby come from hobbyist breeding rather than commercial sources. Used to have a retailer up in Milwaukee who ordered wild fish from Nigeria, and the wild individuals were surprisingly variable, but mostly quite colorful.When I kept these in the 70s there was NEVER any doubt about the sex of these fish because male and female looked so different.
What has happened to them since then?
In my opinion they have had 90% of the beauty bred out of them.
Farming promotes quantity over quality, for economic reasons.