EYE OF SCIENCE / SCIENCE PHOTO LIBRARY EYE OF SCIENCE / SCIENCE PHOTO LIBRARY
Striped red mullet or surmullet (Mullus surmuletus) fluorescing underwater, photographed at night using blue coloured flashlight and a yellow filter. Surrounding algae glow red. Blue light excites pigments within some underwater organisms causing them to emit a fluorescent glow. In fish, this may provide camouflage or warning. Photographed in the Mediterranean Sea.
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