I say real. You don't know how many times I've read a story of a local farm cow with "Mickey Mouse Ears" that has made it in the news. Trust me, it's more than what you care to read about.
Well - our family do own a few Japanese Koi Fishes (which is what I think those are - or they look very similar). I don't think it is impossible - but for some reason I have doubt. My father on the other hand believe it is real. He claims that is not the most "weirdest" thing to come out of China.