Some octopuses can change their color according to their mood.
When it comes to changing color, octopuses are the ultimate chameleons. The secret behind their color capability is special skin cells called chromatophores. Each chromatophore consists of three bags of pigment. By squeezing or expanding the bags, octopuses can change the color displayed by each cell, allowing millions of subtle combinations. And since each cell is controlled separately, they can create remarkably sharp displays.