Bobtail squid is another bioluminescent creature in this world. Unrelated to the bacteria, the squid can camouflage by using its chromatophores, pigmented cells that can be contracted or expanded to modify its color, and by carrying a covering of sand on top of itself, which adheres to its mucus secretions. Who doesn't want to be invisible time to time? Invisibility opens doors, creates opportunity, where none seemed to exist before. When we are unseen, we have an enormous advantage in moving in, doing things we wish or need to do, and in the process, to change the very dynamic of existing, seemingly closed, patterns. Vision is the art of seeing what is invisible to others.