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 ...

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 ...

Sean Burgess (right) and Bruce Draper, professors in the UC Davis College of Biological Sciences, are using zebrafish to detect chemicals that may cause reproductive harm. The GloNad fish glow red or ...