That's incorrect. There is no "evolutionary" relationship in gene skipping. Ancient Coral share immune genes with Modern Man...for Evolutionary Theory to have a shot at potential correctness, there would have to be evidence of those same immune genes in some Fish of some Age or "branch."
But there is no such evidence. Fish don't have those immune genes now, and don't appear to have ever had them in the past...per the evidence in hand today.
As I said, please give a source. The blurb mentioned earlier did not say these genes were not found in fish, neither did the research paper published. I'm quite sure you must have noticed my request, I'm inclined to think you're avoiding it.