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
Military camouflage nicknamed "Pink Panthers"; the colour had been observed to be indistinguishable from sand at a distance. Nets can be effective at defeating visual observation. Traditional camouflage nets use a textile 'garnish' to generate an apparent texture with a depth of shadow created beneath it, and the effect can be reinforced with pieces of vegetation. Modern nets tend to be made of a continuous woven material, which is easier to deploy over a vehicle and lack the "windows" between patches of garnish of traditional nets. Some nets can remain in place while vehicles move. Simple nets are less effective in defeating