Dragonfish (Idiacanthus antrostomus) with light-producing organ beneath mouth called barbel. This lure attracts prey close so the fish can lunge forward and grab a meal, Pacific [Getty Images]

Dragonfish (Idiacanthus antrostomus) with light-producing organ beneath mouth called barbel. This lure attracts prey close so the fish can lunge forward and grab a meal, Pacific — see more

Dragonfish (Idiacanthus antrostomus) with light-producing organ beneath mouth called barbel. This lure attracts prey close so the fish can lunge forward and grab a meal, Pacific

Oxford Scientific Mark Conlin