Camouflage the peacock flounder, squid and octopus actively change their skin patterns and colours using special chromatophore cells to resemble their current background, or, as in most chameleons, for signalling. However, Smith's dwarf chameleon does use active colour change for camouflage. Each chromatophore contains pigment of only one colour. In fish and frogs, colour change is mediated by the type of chromatophores known as melanophores that contain dark pigment. A melanophore is star-shaped; it contains many small pigmented organelles which can be dispersed throughout the cell, or aggregated near its centre. When the pigmented organelles are dispersed, the cell makes a
Disruptive Pattern Camouflage Uniform of changes. It is influenced partly by early US Jungle Camouflage patterns, such as "Duck Hunter"/"Frog-Skin". DPCU was developed following aerial photographs of the Australian terrain to determine which colours and patterns would be most suitable for camouflage uniforms. The selected five colour pattern consists of a greenish sand coloured background with randomly arranged spots of orange-brown, mid-brown, leaf-green and very dark green overlaid. While a mid-grey tone was included in early test uniforms, this was omitted in later uniforms in favour of a second brown tone. The standard DPCU works in areas from arid bushland through to tropical jungle