Posted on August 23, 2017 by WillemWednesday/ glowing in the deep Pictures from the NYT. Fireflies, anglerfish, and other organisms produce the light-emitting pigment luciferin and the enzyme luciferase. Luciferin reacts with oxygen to create light. This New York Times article points out that creatures of the deep sea use light much as animals on land use sound — to lure, intimidate, stun, mislead and find mates. I love the pictures of the creatures.