You may notice many threads where people have bought a fish they cannot ID, much of this is due to random hybrids taken to LFSs and sold as something they are not.
For those of us that prefer pure strain this has muddied the waters with unrecognizable mutts.
The trimac, and many Viejas are prime examples of this unidentfiablility.
And in nature when hybrids happen, natural selection of the fittest weeds out the weak, or unfit.
In aquariums people determine what survives solely by outward appearance, often allowing the unfit, and mutations to proliferate.
In the past line bred and hybrid live bearers were commonly prone to Flexibactor columnaris, while cichlids were often not, now with the invention and influx of the flowerhorn, cichlids seem to have become the next target group commonly infected the bacteria. I believe selecting genes based only for color, and humps has allowed
for the robust health based genes to be reduced.
Just as selecting corn based only on sweetness has limited its resistance to disease,
or pests, and made chemical application its only chance for success.
