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 ...

The glowing light is created by bacteria the flashlight fish hosts in special organs below the eyes, which keep the symbiotic organisms happy, including serving them with extra oxygen through a system ...

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 ...

A genetically engineered fish that glows green from the inside out is helping illuminate what pollutants do inside the body. Endocrine disruptors are substances found in a wide range of industrial ...

The glow of glowing fish comes from the jellyfish Aequorea victoria. The GFP gene from Aequorea victoria was transferred to a zebrafish, where it is expressed in the muscle cells of the zebrafish.

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.

Even in the blue underwater realm, fish can see red in more ways than one. Reef fish that see glowing red patches on a rival aggressively bite and put on extra threatening displays, researchers say.