Flashlight fish are a bizarre group of fishes that have symbiotic bacteria under their eyes that glow in the dark and can be turned off and on.

You know those little glow-in-the-dark stars that dot the ceilings of children’s rooms? Yeah, I didn’t have stars. Instead, I had little glowing dolphins, starfish, and sharks “swimming ...

Flashlight fish are a bizarre group of fishes that have symbiotic bacteria under their eyes that glow in the dark and can be turned off and on.