In the film, Doctor Tom Gray uses a fluorescent jelly-fish gene as a marker in the therapeutic serum he administers to his experimental rabbits. The gene expresses itself as a fluorescent glow inside their eyes.
Now, scientists in the real world have imitated the fictional Tom Gray, genetically altering the cells of pigs so that the animals glow all through their bodies. (See Reference link below.)
Let’s hope their fluorescence is not a marker like Tom’s, for the most dangerous of genes, Gene-X.
Source: Boffins create fluoro pigsSCIENTISTS have successfully bred the world's first fully fluorescent pigs.