Conclusion The discovery that fish biofluorescence evolved over 100 times in the last 112 million years underscores its evolutionary importance, particularly in reef ecosystems.

The researchers found that biofluorescence evolved more than 100 times in marine teleosts and is estimated to date back about 112 million years, with the first instance occurring in eels.

Birds-of-paradise are even colorful in the dark, with feathers and body parts that glow a brilliant yellow-green under ultraviolet (UV) light, a new study found.

The researchers found that biofluorescence evolved more than 100 times in marine teleosts and is estimated to date back about 112 million years, with the first instance occurring in eels.

Study finds that birds-of-paradise are biofluorescent, suggesting that this "hidden" phenomenon provides enhanced signaling for hierarchy and courtship.