Abstract:The embryonic development of golden cuttlefish under artificial hatching conditions was observed. The average weight of newly spawned eggs is 0.99 g/particle (n=100), and the major axis is 11~24 mm, the minor axis is 8~15 mm. Egg yolk is egg-shaped, pear-shaped, with long diameter of 5~6 mm and short diameter of 3~4 mm, and is wrapped by three-egg membrane outside. Three egg membrane in the embryonic development processed a soft figuration narrow enlargement change. The fertilized eggs hatched at water temperature of 20~25℃, and the larvae hatched out about after 26d hatching. In terms of the exterior appearance and the typical characteristics, process of embryonic development includes 5 stages: cleavage stage, blastula stage, gastrulae stage, organ development stage and hatching stage. In the embryonic development process, the morphological changes of the eye were relatively large, and it turned from colorless, red into black. KEY WORDSGolden cuttlefish(Sepia esculenta Hoyle)Embryonic development
