These genetically modified animals glow green

Click to visit Neonmice.com

From the NeonMice website:

NeonMice™ are the world’s first commercially available Fluorescent mice.  Our genetically modified ‘glow-in-the-dark’ mice make both an amazing pet and an interesting conversation piece.  When viewed under a standard UV black light; NeonMice™ emit green, red, blue, or yellow light.