We all know camouflage when we see it, or when we don’t, as the case may be. But what does that actually mean? “Qualitatively, it’s pretty easy for people to say ‘that’s camouflaged’ or ‘it’s not,’” says Roger Hanlon, a senior scientist at MBL, whose research focuses on camouflage in marine animals. “But to grade camouflage or to quantify it somehow, really has hardly ever been attempted until very recently.” Camouflage is everywhere in the natural world – every branch of animal life, every