What is a glo fish?

GloFish are genetically modified zebrafish that fluoresce under ultraviolet light. They were the first genetically modified animals to be sold as pets.

Here's a breakdown:

* Zebrafish: The base species is the zebrafish, a small, tropical fish.

* Genetic Modification: Scientists have 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: GloFish are available in various colors, including red, orange, yellow, green, blue, and purple, depending on the specific fluorescent protein used.

* UV Light: The fluorescence is only visible under UV light. In normal light, GloFish look like regular zebrafish.

Here are some additional points about GloFish:

* Not harmful: There is no scientific evidence suggesting that GloFish are harmful to humans or other animals.

* Ethical concerns: Some people have ethical concerns about genetically modifying animals.

* Popularity: GloFish are popular pets due to their unique appearance and ease of care.

* Research: The technology used to create GloFish 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 the ethical considerations of this technology.