Active camouflage the surface, so when marine animals are seen from below, they appear darker than the background. Some species of cephalopod, such as the eye-flash squid and the firefly squid, produce light in photophores on their undersides to match the background. Bioluminescence is common among marine animals, so counterillumination may be widespread, though light has other functions, including attracting prey and signalling. Color change permits camouflage against different backgrounds. Many cephalopods including octopuses, cuttlefish, and squids, and some terrestrial amphibians and reptiles including chameleons and anoles can rapidly change color and pattern, though the major reasons for this include signalling, not
Disruptive Pattern Camouflage Uniform grey, sand, olive-green and red-brown. The new variant was designed to overcome issues associated with operating in and around the "green belt" areas of Afghanistan (particularly in corn fields) where the DPDU was too light in colour but where the DPCU was too green for open areas. Trials however, showed that in most areas the original DPCU performed more effectively than the new Midpoint camouflage and it was not adopted. One criticism was that the new camouflage used colours that were still too biased towards desert operations. Australian special forces operating in Afghanistan have been seen wearing Crye's Multicam camouflage.