glow fish (the zebra danios) and neon or glow tetras?

Glo fish are actually NOT dyed. They are genetically engineered to be that color. Their genes have been spliced. They are not in anyway subjected to the same cruelty that dyed fish endure. Neon tetras are naturally blue and red, same as cardinal tetras. That is their coloring. They are not dyed.

Anything that is given a silly name like cotton candy, fruit, pastel, jellybean, etc, those fish are dyed and their color will eventually fade and the fish is subjected to painful prodecures and potentially fatal injuries to obtain that temporary coloring.

T

Tetras will do suited if stored in ordinary numbers of 5 or greater because of the fact they seem to be a training fish. additionally,vast Danios will consume small Tetras if given of challenge like maximum fish they provide theory to something sufficiently small to be eaten as capacity nutrients yet many times they are very non violent... i propose some Rainbow fish,Black Mollies or possibly a woman Beta

Some of those colored fish are dyed, like the "painted glassfish" and "blueberry" or "rooty tooty" tetras.

GloFish (tm) are not dyed, they are zebra danios that have had their color genes genetically modified. I don't think they are as attractive as natural zebra danios.

But many tetras and other small and large fishes have extremely bright colors naturally. Neon tetras, glowlight tetras, head and tail lights, cardinal tetras, rainbow fish, colorful killifish, and many others have completely natural, incredibly vivid colors.

One more reason nobody should buy the artificial ones.

The coloring in neon tetras and cardinals is natural.