There are so many other fish that they inject colors into the fish, but if you really think about it, by the time you buy a GlowFish, it is probably a couple of generations down, from the actual fish that got injected. This is a direct quote from GlowFish.com....
“The fluorescent color in GloFish is produced by an inherited fluorescent protein gene that is passed from generation to generation and creates the beautiful fluorescence that can be seen when looking at the fish. The fluorescent protein genes are derived from naturally occurring genes found in marine organisms.
GloFish are similar to other fish, except they have a much brighter disposition. GloFish are available in six stunning colors: Starfire Red®, Electric Green®, Sunburst Orange®, Cosmic Blue®, Galactic Purple®, and Moonrise Pink®.
Today’s GloFish fluorescent fish are bred from the offspring of fluorescent fish that were originally developed several years ago. Each new GloFish inherits its unique color directly from its parents, maintains the color throughout its life, and passes the color along to its offspring.
If you have any questions on GloFish or Glofish products please call 1-800-GLOFISH, anytime between 7:30am – 5:30pm EST, Monday through Friday.”
https://www.glofish.com/about/faq/
Do you trust it?
“The fluorescent color in GloFish is produced by an inherited fluorescent protein gene that is passed from generation to generation and creates the beautiful fluorescence that can be seen when looking at the fish. The fluorescent protein genes are derived from naturally occurring genes found in marine organisms.
GloFish are similar to other fish, except they have a much brighter disposition. GloFish are available in six stunning colors: Starfire Red®, Electric Green®, Sunburst Orange®, Cosmic Blue®, Galactic Purple®, and Moonrise Pink®.
Today’s GloFish fluorescent fish are bred from the offspring of fluorescent fish that were originally developed several years ago. Each new GloFish inherits its unique color directly from its parents, maintains the color throughout its life, and passes the color along to its offspring.
If you have any questions on GloFish or Glofish products please call 1-800-GLOFISH, anytime between 7:30am – 5:30pm EST, Monday through Friday.”
https://www.glofish.com/about/faq/
Do you trust it?