The fact that absolutely everything is green on them, and the edges are pretty sharply defined like they used the selection tool and just messed with the color balance. Here's an example i did in about 2 minutes:
And then, the only information i can find on these is on these forums and on one other forum, only one picture of them can be found as far as i can tell anywhere on the internet, and the glofish website says absolutely nothing about these anywhere i can find.
No they are real, I have seen these at my LFS. They had pink ones too. I do not like them, even though I am okay with selective breeding. I guess it seems like cheating rather than spending years to breed them. They should make some colors that are a bit more normal.