Cuttlefish, this renown black Zuo (Z é I) , weigh inkfish or cuttlefish againElement of the coloured in its skin is follicular, can follow " mood " change and change colorThe body wall of cuttlefish wait for composition by epithelial skin, muscle, provide endoskeleton. Epithelial for monolayer cell, its fall have a lot of pigment cellsThe prepared Chinese ink inside cuttlefish body at ordinary times in the ink sac in abdomen of lay aside existence, encounter enemy kill when invading, they are met from ink sac ejective a prepared Chinese ink, catch the seawater all round Chinese ink is blackly, seize the opportunity next decamp. Cuttlefish belongs to marine mollusc, do not belong to fishHappy perch lives in the marine deep water of high seasBe fond of take animal of crab, fish, shellfish