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Dyed or genetically modified?

Are the so called pink genetically modified danios on sale in the UK at the moment actually dyed fish? Matt Clarke thinks so.

Dyed or genetically modified?

Over the past few months, a number of shops in the UK have had bright pink Zebra danios in stock which bear a striking resemblance to the genetically modified GloFish. Indeed, most stores believe the fish are genetically modified and are telling their customers that is how they were produced.

Real GloFish (like the ones in the picture above) are marketed in the US by Yorktown Technologies. The original parent fish were produced in the laboratories of the National University of Singapore and have an extra RFP (Red Fluorescent Protein) gene inserted into their genome from a coral which makes them "glow" pink, under certain lighting.

However, senior officials from Defra and the State Veterinary Service confirmed to me a few months ago that no licences for the import, sale or keeping of GMOs have been issued in the entire EU - let alone in the UK.

Given how astonished they sounded when I asked the question, and given the recent restrictions on the import of much less controversial species, I think it's safe to say that the situation probably hasn't changed.

This means that if these fish are genuine GM fish, they're almost certainly illegal and anyone keeping or importing them risks prosecution.

It's much more likely that the pink danios on sale are actually dyed. Chances are, that like Parrot cichids, these fish are probably being dyed through injections with coloured dyes...

Either way, retailers and fishkeepers are best off avoiding them.


iconMatt Clarke: Mon June 19, 2006, 8:56 am
Views: This entry has been read 12,656 times.

9 comments on: Dyed or genetically modified?
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Reader comment

"If most stores think the pink zebra danios are GM why are they stocking them. After they have told the customer that is how they think they are produced do they still go on to sell them that to me is just encouraging them."

Posted by: Hedley Snow - 3 years, 5 months ago
Date: Saturday June 24th, 2006, 11:07 am
Reader comment

"I think that dying fish is disgusting and wrong! Why cant people like fish the way they are instead of possibly poisoning them and ruining the natural and unique identity. If they are selling GM fish shouldn't they have have been told of this before getting themselves into trouble that could cost them their business. "

Posted by: Rachel Oakley - 3 years, 4 months ago
Date: Sunday June 25th, 2006, 6:33 pm
Reader comment

"Get real. "Disgusting and wrong?" That is not the issue, these fish exist because there is a market for them. It's as simple as that. The creators of these fish, dyed or GM, have invested large amounts on money to meet a market demand. Educate buyers and you will eliminate the market and the fish, if people care. People may simply want pretty fish, and not care how they came to be "pretty.""

Posted by: Ken Cox - 3 years, 4 months ago
Date: Tuesday June 27th, 2006, 4:26 pm
Reader comment

"What is wrong with these people?. Fishkeepers have an almost endless choice of naturally coloured fish to choose from. I really can't see the point in trying to improve on nature. If someone actually wants to keep these unfortunate fish, they are in the hobby for the wrong reason. "

Posted by: Peter Chadwick - 3 years, 4 months ago
Date: Tuesday June 27th, 2006, 7:40 pm
Reader comment

"Selling of GM and imported fish is disgusting. why cant people enjoy fish in their natural beauty? people who wants dyed fish are people who don't care about fish and just want to make their tank look pretty! their are plenty of different species of fish out there that are completly gorgeous but natural.
The dying of fish is barbaric and it is not fair.
To those people out there who are selling these poor fish illegally are risking their business and prosecution, and i dont have any sympathy for these people eithier serve themselves right."

Posted by: Karina Ellwood - 3 years, 4 months ago
Date: Saturday July 1st, 2006, 8:05 pm
Reader comment

"I think this procedure is cruel & unnecessary!!! Fish are beautiful naturally the way god made them. They do not need to be inhanced like that. You people need to be turned in for even having it available to your customers. The only reason I even registered with your website, was to add this comment!!!!!!! I am very dis-pleased!!!"

Posted by: Shelley Sharp - 2 years, 10 months ago
Date: Monday January 8th, 2007, 9:46 pm
Reader comment

"Oh, come on. How can this market you speak of exist? People who don't care how the fish got their colours would not buy these fish if they weren't available, because they wouldn't know they exist. Therefor the market is created by the people who dye the fish, not the other way around. I find it difficult to imagine that people would actually get the idea themselves to ask for a fish which has been additionally coloured. I find it much more likely for people asking for a brightly coloured fish and then being offered dyed fish by the retailer."

Posted by: Kevin Vits - 2 years, 8 months ago
Date: Friday March 2nd, 2007, 8:15 pm
Editorial comment

"We exclusively revealed that a reader had bred these fish after obtaining them illegally from a dealer in England. The fish are believed to be genetically modified - and not dyed - which makes them illegal to keep, sell or market in the UK or the EU."

Posted by: Matt Clarke - 2 years, 7 months ago
Date: Monday April 2nd, 2007, 1:01 pm
Reader comment

"Nothing wrong with GM. Bring it on. Evolution on steroids. Imagine the possibilities everything from disease resistance to a photosynthesizing guppy. My only objection is that the "Manufacturers" usually prohibit the breeding of their creations without a licence or engineer them to be sterile. Dyed fish....now that’s just fraud."

Posted by: Paul Gallon - 1 year, 2 months ago
Date: Saturday September 20th, 2008, 12:57 am

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About the author: Matt Clarke

Matt Clarke

Editor-in-Chief, Matt Clarke, writes the regular Interesting Imports column on rare and unusual fish in the UK aquarium trade. He's kept fish for 30 years and holds a degree, two higher degrees and two diplomas in fish biology, taxonomy and computational biology.

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