GloFish are genetically modified zebrafish that fluoresce under ultraviolet light. They were the first genetically modified animals to be sold as pets.
* Zebrafish: The base species is the zebrafish, a small tropical fish.
* Genetic modification: Scientists introduced a gene from jellyfish or coral into the zebrafish's DNA. This gene codes for a fluorescent protein that makes the fish glow.
* Fluorescent colors: Available in red, orange, yellow, green, blue, and purple.
* UV light: Fluorescence is only visible under UV light. In normal light, GloFish look like regular zebrafish.
Additional points:
* Not harmful: No scientific evidence suggests GloFish are harmful to humans or other animals.
* Ethical concerns: Some people have ethical concerns about genetically modifying animals.
* Popularity: Popular pets due to unique appearance and ease of care.
* Research: The technology has applications in scientific research, such as studying gene expression and disease development.
Overall, GloFish are a fascinating example of genetic engineering, showcasing the potential and ethical considerations of this technology.