They glow neon green, red or orange: Far more fish than thought possess the ability to biofluorescence how researchers have now discovered.

Invisible to our eyes, they absorb blue light and emit residual light back in neon colors. At least 180 organic fluorescent species of fish, including sharks, rays, corals, fish, and even eels, the scientists found already at their first search in tropical coral reefs.
“By designing scientific lighting that mimics the ocean’s light along with cameras that can capture the animals’ fluorescent light, we can now catch a glimpse of this hidden biofluorescent universe,” biologist David Gruber of Baruch College and the American Museum of Natural History said in a press release Jan. 8.