Koi have six types of color cells in their skin.

锦鲤的皮肤有六种颜色细胞。

The color changes are executed by two different kinds of cells in the octopus ’ skin, mainly by color cells on the skin’s surface call chromatophores.

颜色变化由章鱼皮肤中的两种不同细胞执行， 主要由皮肤表面称为色素细胞的颜色细胞执行。