By the light of day, the two transgenic baby rabbits look no different from their non-transgenic siblings -- white, fluffy and very cute.
But put the whole litter under a black light, and you'll know exactly which two bunnies are special. They'll be glowing bright , fluorescent green.
(For daylight and black-light shots of the transgenic rabbits and their littermates, see the photo gallery above).
The glowing bunnies were born this month in a lab at the University of Istanbul. Scientists at the university gave the rabbits their glow by inserting a gene for a jellyfish protein into their genomes in a process called transgenesis.
The jellyfish protein is invisible by day, but emits a bright green glow when it is exposed to ultraviolet light.
Stefan Moisyadi, an associate professor at the University of Hawaii Manoa who worked with the Turkish team, said the protein does not hurt the rabbits or alter their lifespan. However, the glowing rabbits will pass the jellyfish gene down to their offspring.