Unlike bony fish, there is no direct control of the pigment cells by the nervous system, and this results in the colour change taking place more slowly than happens in fish.
ʌnlˈaɪk bˈoʊni fˈɪʃ, ðɛɹ ɪz nˈoʊ dᵻɹˈɛkt kəntɹˈoʊl ʌvðə pˈɪɡmənt sˈɛlz baɪ ðə nˈɜːvəs sˈɪstəm, ænd ðɪs ɹɪzˈʌlts ɪnðə kˈʌlɚ tʃˈeɪndʒ tˈeɪkɪŋ plˈeɪs mˈoːɹ slˈoʊli ðɐn hˈæpənz ɪn fˈɪʃ.