Like I said in the original post, his coloration is labeled a "neon Green Terror" by one site (credibility limited). I've tried to do some research and haven't found much on Neon Green Terrors. My guess is that he is some type of hybrid; figures.
Im not entirely sure were i read it. But i believe it to be a genetic mutation instead of a hybrid. Were one day said 'neon' GT appeared and it has been selectively bred ever since.
Either way, it looks great! Good pickup.