Okay firstly I'm not an expert but I do love fish tanks and fish and have read several books on all things fish including breeds.
My apologies I was originally misinformed and mispoke as to the fish I was talking about. They are generally called painted tetras not glofish, I was wrong I admit that. That's what I get for posting very late at night. Our local store puts them both in the same tank and I was there for under the misconception that they were both dyed.
Those fish are normal every day colored fish(some being totally clear-search glass fish you'll find some of the fish they like to dye) that are dipped in an acid type bath to remove their natural protective slime coat they are then dipped in various harsh inks, or sometimes directly injected with the ink(glass fish in particular). This process is so harsh and cruel that only about 30-40% survive it from what I've read usually less and only a handful of those ever survive much more than another year. For this reason I feel these fish shouldn't be sold at all. Plus glass fish are cool! Now I do believe certain fish are naturally neon colored but to my knowledge glow fish are not. If you want brightly colored fish I urge you to get neon tetras, pristella tetras, fancy guppies, mollies, or platies(platy) instead. There are so many other healthier choices that don't have to be tortured to create their beauty. Look into it there are many other amazingly colored fish.
Wow starlings really?! I didn't know they were an invasive.