I hear you Rob and I think we are all on the same page or more less.
No one really gave A. ocellaris the common name perc(ula). It is kind of the word spam. It used to just mean a canned ham product, now it also means unsolicited email. Who gave it that name, well maybe in today’s information age we might be able to track that person down, but I really doubt you will ever find the person that first called a A. ocellaris and perc(ula).
This is very close to another pet peeve of mine. The misidentification of clownfish species. I do not know how many times I have seen VERY VERY bad ID's. We would not put up with it in say a drug store "so is that aspirin really aspirin or antacid?".