I agree this is wrong and would not purchase or condone the altering of fish including hormone and dye injections. Just simply stated the fish looks cool. Heck I wont even feed feeders to my fish cause I think that's cruel.
Did this in a lab once...with E.Coli....Ended up getting an E. Coli infection the next week. Haha. Remember everyone, wash your hands after you touch anything dirty: glowing or not.
Anyways, I don't see an issue if the fish are being made for research. Novelty on the other hand is something I don't condone.