Red Devils and Midas come from the same lake in Nicaragua. And there was thought years back, that they were the same species, just with a different feeding strategy, much like Herichthys minckleyi does in Cuatro Cienegas, where there are molluscan feeders, detritus feeders and piscivores, all with different dentition.
Add the confusion over which carpintus is, which, often debated on this site.
Even DNA experts may differ, which nuclease is proper to determine what species is what.
Rules?
Do we need more hybrid mongrels?
If we had rules, would anyone follow them?
Just because one can cross one species with another, is it a good idea?
What if a species from Cuba which has an immunity to Columnaris, because it comes from warm water, crosses with a mainland species that doesn't, because waters there, are cooler?
Are we ready for an explosion of the disease duck lips (which seems to be happening already), and the creation of super columnaris from random excess antibiotic use, as bacteria hybridize, or become immune.
As a microbiologist, this is the side of random hybridization that worries me, and that seems to me, the pretty color, or bump on the head promoters, don't see.
Or maybe they do, and don't give a rat.