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I know there are thoses that are bred to be glo fish now, but a lot of places near me still sell the dyed ones. And if you are going to try to correct me since I've been in the hobby probably longer I care to admit please use the correct term for the dyed fish which is GLO, not GLOW. Natrual Glow fish are the glow light tetra, and a few other speices.
Autumn Haze said:
Hawkeye Farms said:
Glo fish should be out of the hobby. They are a manmade fish. Dye is injected into the fish to make them have that glow appearance. Any dyed fish tend to lead short lives from what I've seen of them.
They are now bred to glow, ethical places no longer inject, there are clear differences now between injected and genetically bred glow fish!
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Hawkeye Farms said:
I know there are thoses that are bred to be glo fish now, but a lot of places near me still sell the dyed ones. And if you are going to try to correct me since I've been in the hobby probably longer I care to admit please use the correct term for the dyed fish which is GLO, not GLOW. Natrual Glow fish are the glow light tetra, and a few other speices.
Autumn Haze said:
Hawkeye Farms said:
Glo fish should be out of the hobby. They are a manmade fish. Dye is injected into the fish to make them have that glow appearance. Any dyed fish tend to lead short lives from what I've seen of them.
They are now bred to glow, ethical places no longer inject, there are clear differences now between injected and genetically bred glow fish!
If I recall (and looking at the GloFish website itself), the fish have been genetically modified from the start. I'm unsure of how practical injecting dye into a fish would be, not to mention how tiny a needle you'd need. The official branded and trademarked GloFish are bred to have a gene that was already naturally occuring in other organisms, the first generation of fish is given the gene through genetic modification, and then that gene is passed on to their fry as a normal gene would. To my knowledge the fish have never been dyed, but I'd be interested if you could provide a source on that. From what I've read about them the dye thing is a myth. Here's the official website: Click 
How can you tell the ones you see are dyed as opposed to genetically modified? They naturally produce the protein that causes a glow; as do many other marine species. The only really artificial thing about them is the gene that causes the protein as it wasn't natural in those species and had to be introduced. I'm not trying to be rude here, and neither was the person responding to you. If I've misread your tone please forgive me, but your response did come off as quite abrasive when they were just trying to bring up another point. Those of us that have been in the hobby for a long time can also learn new things, heaven knows I have haha |
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Simply put the dye as with the frankenfish blood parrot chichild under the skin kind of like a tattoo. The best way to tell true glow fish is the higher neon and fantasy colors that don't look natural. I know the Glo Barbs are dyed since barbs do not have the natural Glo gene mutation as are the jellybean blood parrot cichilids. Danio's I'm on the fence about, along with certian tetras like the black skrits. Guppies, neon and cardnil tetras tend to mutate in their colors so those are not likely to be dyed if you can confrim the bloodlines. GloFish were originally dyed tetras of either the glow light, or neons, but eventually as they bred the gentic mutation started to occur naturally.
The Unknown said:
Hawkeye Farms said:
I know there are thoses that are bred to be glo fish now, but a lot of places near me still sell the dyed ones. And if you are going to try to correct me since I've been in the hobby probably longer I care to admit please use the correct term for the dyed fish which is GLO, not GLOW. Natrual Glow fish are the glow light tetra, and a few other speices.
Autumn Haze said:
Hawkeye Farms said:
Glo fish should be out of the hobby. They are a manmade fish. Dye is injected into the fish to make them have that glow appearance. Any dyed fish tend to lead short lives from what I've seen of them.
They are now bred to glow, ethical places no longer inject, there are clear differences now between injected and genetically bred glow fish!
If I recall (and looking at the GloFish website itself), the fish have been genetically modified from the start. I'm unsure of how practical injecting dye into a fish would be, not to mention how tiny a needle you'd need. The official branded and trademarked GloFish are bred to have a gene that was already naturally occuring in other organisms, the first generation of fish is given the gene through genetic modification, and then that gene is passed on to their fry as a normal gene would. To my knowledge the fish have never been dyed, but I'd be interested if you could provide a source on that. From what I've read about them the dye thing is a myth. Here's the official website: Click
How can you tell the ones you see are dyed as opposed to genetically modified? They naturally produce the protein that causes a glow; as do many other marine species. The only really artificial thing about them is the gene that causes the protein as it wasn't natural in those species and had to be introduced. I'm not trying to be rude here, and neither was the person responding to you. If I've misread your tone please forgive me, but your response did come off as quite abrasive when they were just trying to bring up another point. Those of us that have been in the hobby for a long time can also learn new things, heaven knows I have haha
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Glofish are genetically altered and are not dyed, nor is the gene something naturally occuring. They have specific genes that were inserted into the progenitor eggs that cause them to glow (hence the name) under black lights, similar to many sea anemones in salt water tanks. Recombinant DNA Technology and Transgenic Animals |
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Hawkeye, you are right that there has been dyed fish offered at pet stores (as you mentioned, utilizing an under-skin tattoo with Parrot Cichlids & a few other species) but I think you are confusing these with GloFish. The trademarked GloFish brand fish were never dyed. For all of the species they offer, the early generations were injected with jellyfish or coral DNA while in egg form - not dye. This DNA alteration added fluorescent proteins which give them their glow/color. Now, they breed true. :) I'm a genetics nerd so I couldn't resist having their orange tetras in my dark-toned, naturally scaped tank. They were a beautiful addition and I was very happy with how healthy and resilient they were. |
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I could be, but the jellybean blood parots have had the bright neon colors also. They are mostly yellows and pinks. Although with I also see very pale pinks, blues, and yellows as well. I knew about the genetically modifying using something from jellyfish or coral DNA when it came to the original GloLight Danios which were the first fish used to do this with. Did you know the original GloFish were never supposed to be in the pet market, but used for detecting pollution in water? Betta's still aren't exactly bred true for the Glo feautre eventhough I have seen them on the market for astromincal prices. The tiger barb Neon/Glos have only started popping up in the past decade or so. The black skrit tetra was one of the first tetras they did the Glo treatment to to start naturally breeding them.
WildWillow said:
Hawkeye, you are right that there has been dyed fish offered at pet stores (as you mentioned, utilizing an under-skin tattoo with Parrot Cichlids & a few other species) but I think you are confusing these with GloFish. The trademarked GloFish brand fish were never dyed. For all of the species they offer, the early generations were injected with jellyfish or coral DNA while in egg form - not dye. This DNA alteration added fluorescent proteins which give them their glow/color. Now, they breed true. :) I'm a genetics nerd so I couldn't resist having their orange tetras in my dark-toned, naturally scaped tank. They were a beautiful addition and I was very happy with how healthy and resilient they were.
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Sunny
