@davocean while I agree with your points about correct matching and instinct, in my opinion, the idea behind captive bred fish losing some of their behavioral traits is not exactly misinformation. There is some research to this effect. A research paper published by the National Academy of Sciences says the following: "
...the hatchery environment during early life stages induces significant physiological and behavioral changes that may ultimately reduce the fitness of hatchery-born fish." (
https://www.pnas.org/content/114/49/12964). This quote also points to two other papers that discuss fitness changes in hatchery-born fish. Mind you, most of this research is done on salmon and not clowns and anemones, and it's endpoint is to measure fitness, not a symbiotic relationship; but the point is that there can be changes in captive-bred fish over generations, as you mentioned.
I want you to know that I respect your opinion and again, I want you to know that I 100% agree that the right clown should be paired with the right nem for very obvious reasons. In many ways, we are trying to replicate nature, so why fight that?... right???
I aim only to make the point that there is peer-reviewed literature in nationally-published journals that do indicate there can be behavioral changes in captive bred fish, and so in my opinion, some of these changes
could indeed occur in clownfish.