You are arguing a point, just for the sake of arguing and it's getting tiresome.
Please do NOT tell me to 'watch documentaries'. I have no need, having studied hard at school and university. If they are the basis of your education, then you will have problems later in life.
I watch more than National Geographic television documentaries and have an MA in biological sciences.
YOU said, and I quote "
This process actually happens in nature too but In smaller number so it’s not actually bad for the fish".
I said that you are wrong and that is does harm fish.
I gave solid examples.
I also described how, even in the artificial aquarium setting, it is harmful to the fish. Again, I gave solid examples.
Once more and for the final time, mutations occur all the time and occasionally they benefit the animal. Occasionally. The majority cause the animal harm and, in the natural world, animals with those mutations die off. In the aquarium, those harmful mutations are encouraged by some, who think that the end result looks good. Idiots than buy these fish, because they look good, being ignorant of the actual harm done to the fish.
Those few mutations that benefit an animal are, by nature, slight. Extreme mutations occur and these cause harm. The example given of giant human beings is a good one, because those people suffer badly with circulatory problems and bone/joint issues.
I find your argumentative nature pointless, based, as it is, on ignorance. Henceforth, I will ignore your posts.