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 ...

This species of flashlight fish, Anomalops katoptron, is about the size of an index finger and is found in the western and central Pacific Ocean. The glowing light is created by bacteria the ...

Flashlight fish have the ability to generate situation-specific blink patterns resembling a visual Morse code. Researchers have shown in laboratory and field experiments that the animals use these ...

“The first time I remember seeing anything bioluminescent I was in Puerto Rico, about 2006, and we were down there doing coral restoration work, which is amazing in itself,” says divemaster Barrett ...