IN pet stores right now, all that glitters is not sold. The nation's first genetically engineered pet has gone on sale: a tiny zebrafish with a gene from a sea coral that makes it red in normal light ...

Many people just found out that flashlight fish exist, thanks to the viral tweet below. The glowing fish have lights under their eyes that blink on and off. But it turns out that there’s even more ...

With distinct tubular eyes and a natural glow, two species of bioluminescent deep-sea fish nicknamed "barreleyes" have been identified. The newly described species are part of the family ...

Bioluminescence might seem uncommon, even alien. But biologists think organisms evolved the ability to light up the dark as many as 50 different times, sending tendrils of self-powered luminosity ...

Well-camouflaged, neutral-colored fish may appear drab to the naked eye, but many actually live secret lives cloaked in flamboyantly bright colors visible only to other fish, new research suggests.