A hawksbill sea turtle that can light up like a neon Christmas tree is the latest addition to a menagerie of animals with an ability known as biofluorescence.  These luminous animals can reflect the blue light hitting a surface and re-emit it as a different color—the most common being green, red, or orange.  Biofluorescence is different from bioluminescence, where animals either produce their own light through a series of chemical reactions, or host other organisms that give off light.