Not a good comparison using dogs as a example. Cross bred dogs are now nearly as popular as pedigree in the UK. Far better dogs with a lot less health issues. The British bull dog is a good example, poor things can hardly breathe.
But I do agree most hydride fish are drab unattractive mutts, and are best culled.
I would agree, probably not the best comparison because cross breed dogs are usually healthier, and my example (probably lost in the semantics) was simply about looks
but....
breed (as you know) is not the same as species.
Breeds are all just variants of the same species Canis lupus familiars.
With fish, hybrids are crosses of two or more species, which often doesn't bode well for health.
When a true species develops, as it evolves and ends up as the fittest for its particular habitat.
e.g. Gymnogeophagus in temperate climate, or Alcolapia in a soda lake where temps reach height most other fish would die.
Hybridizing (choosing individuals) only for color or an enlarged hump, or short body, may overlook and compromise health genes.
But its interesting that variants (breeds) in fish health often mirror the same compromised health in dogs bred for a certain face shape, or bone structure.
EBJDs are generally found to be less healthy than normal JDs.
Just as ballon bodied fish, are often less robust and riddled with health issues, with their crammed together organs, than the normally shaped individuals
