The ocean glows with undersea life that makes its own light. Animals have evolved this bioluminescence for camouflage, to find mates or to repel or confuse predators.
Sea Life Color Codes Food to Evade Danger

1
Crabs feeding from coral, Credit: Sonke Johnsen

2
Blue emitting plankton drifting past green emitting coral, Credit: Sonke Johnsen

3
Bioluminescence of a colonial anemone, Credit: Sonke Johnsen

4
This bottom dwelling colonial anemone Credit: Sonke Johnsen