has anyone heard of these tetras called green fire tetras and I spotted a picture of them onn a price list at work a few days ago it claims there not dyed but I was wondering if anyone had any additional info
Are these the fluorescent fish? There are some that are not dyed, rather they are genetically modified. The gene insertion occurs while the eggs are carried by the female, the genes are extracted from jellyfish. Once the first generation has been modified, the genes can be passed on, though I have heard other places that the ones for sale are sterilized because they are patented.
I would be suspicious of fakes which are dyed and sold as genetically modified. On the other hand, I don't know the safety record for the original mothers, and I don't know what your ethics are regarding genetically altering animals just to make them look cool. On the other hand, the safety record would be better than dying because as I mentioned, once the initial generation of eggs has been modified, they will pass the color on to future generations.