What are the pigment-containing cells called that covers the squid's skin to change colour?

What are the pigment-containing and light reflecting cells called that covers the squid%26#039;s skin enabling it to change color to suit its surroundings?|||http://www.thecephalopodpage.org/cephsch鈥?/a>





Pigment containing = chromatophores which are groups of cells that include an elastic saccule that holds a pigment, as well as 15-25 muscles attached to this saccule. These cells are located directly under the skin of cephalopods. When the muscles contract, they stretch the saccule allowing the pigment inside to cover a larger surface area. When the muscles relax, the saccule shrinks and hides the pigment.





Light reflecting = Iridophores which are found in the layer under the chromatopphores. Iridophores are layered stacks of platelets that are chitinous in some species and protein based in others. They are responsible for producing the metallic looking greens, blues and golds seen in some species, as well as the silver color around the eyes and ink sac of others . Iridophores work by reflecting light and can be used to conceal organs, as is often the case with the silver coloration around the eyes and ink sacs. Additonally they assist in concealment and communication. Previously, it was thought that these colors were permanent and unchanging unlike the colors produced by chromatophores. New studies on some species of squid suggest that the colors may change in response to changing levels of certain hormones. However, these changes are obviously slower than neurally controlled chromatophore changes. Iridophores can be found in cuttlefish, some squid and some species of octopus.|||I didn%26#039;t look it up to confirm but I believe they are called chromatophores (color carriers literally)|||Chromatifores (sp?).