This Zebra Danios are transgenic, that means that their DNA has been modified, in this case, to glow with black light. Scientists say that they were made in first term to detect contamination in the water, but in their webpage they don't say no more about what water and how. So they decided to sell them as pets. In many countries they are forbidden but in the USA they are easy to find in pet stores costing about $5.00 each. We keep two of them.
The following four minute clip was aired on Channel 4's Animal Farm on April 2, 2007.
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