Camouflage there is no background, the principal methods of camouflage are transparency, silvering, and countershading, while the ability to produce light is among other things used for counter-illumination on the undersides of cephalopods such as squid. Some animals, such as chameleons and octopuses, are capable of actively changing their skin pattern and colours, whether for camouflage or for signalling. It is possible that some plants use camouflage to evade being eaten by herbivores. Military camouflage was spurred by the increasing range and accuracy of firearms in the 19th century. In particular the replacement of the inaccurate musket with the rifle made
Underwater camouflage in a vertical position with its head pointing downwards, and behaves in a way that perfectly resembles the movement of a piece of seaweed: moving back and forth in the surge, as if it was inanimate. Self-decoration is employed by animals in different groups, including decorator crabs, which attach materials from their environment, as well as living organisms, to camouflage themselves. For example, the Japanese hermit crab, "Eupagurus constans", has the hydroid "Hydractinia sodalis" growing all over the shell that it lives in. Another hermit crab, "Eupagurus cuanensis", has the aposematic orange sponge "Suberites domuncula" which is bitter-tasting and not