Photos can hardly capture natural bioluminescent bacteria, for their glow seems more magnificent than what a camera can reproduce.
Foraging on the surface of these prawns were a lawn of bacteria called Pseudomonas Fluorescence that produces a green blue fluorescence.
Invisible in natural light... it reminds us that sometimes you have to be in the dark to see bacteria - we avoided them instinctively, although they probably wouldn't cause us any serious damage. Glowing (dead) Prawns by c-lab uk, on Flickr