Why Would Anyone Want To Make Fish Glow?
The glow of glowing fish comes from the jellyfish Aequorea victoria. The GFP gene from Aequorea victoria was transferred to a zebrafish, where it is expressed in the muscle cells of the zebrafish. Interestingly creating glowing fish for pets wasn't the original purpose of the experiment. Instead these glowing fish were designed to sense toxins in the environment.