I love this picture of an octopus, the ‘chameleon of the seafloor’. The skin of an octopus is like that of a pointillistic work of art: it has millions of chromatophores (cells with pigments). Octopuses have yellow, orange, reds, browns or even black pigments, and can camouflage itself against its background when an enemy approaches. There is a complex connection between its brain, its nervous system, and the nerve cells that control the color of its skin.