Dermis is region of skin that lies below the epidermis. It has a loose connective tissue or stratum spongiosum. Stratum spongiosum has lymph spaces, nerve fibres, blood capillaries, mucous glands and chromatophores. Mucous glands secrete mucous which makes the skin moist and slippery. Chromatophores provide colouration to skin. They are of three types :
(a) Melanophores (brownish black)
(b) Lipophores (reddish and yellowish)
(c) Guanophores (whitish)