Made of Fibre Glass. Various details shown include :- Mouth, Upper Jaw, Lower Jaw, Nostril, Gill Backers, Gill Cavity, Gill Arch (operculum), Heart, Liver, Spinal Cord, Kidney, Swim Bladder, Intestines, Roe, Pelvic Fin, Ventral Fin, Dorsal Fin, Lateral Fin, Scales, Caudal Fin. Mounted on a plastic base.