Thank you for the link. What is puzzling me is that the fish looks and acts perfectly normal, no itching, no difficulty breathing, great appetite, very active. The only issue I can see is that one little spot, which looks more like a growth/protrusion than any kind of discoloration. I am going to lean on the side of no for the flukes.
I also am thinking no for cauliflower disease since the description seems to state that the disease effects the fins, and his fins are clear and clean. I saw a fish at the LFS
with that disease , and it looks quite different, but I certianly don't have anywhere near enough experience with it to know for sure.