Abstract: A singlefactor experiment was conducted to study the effects of different temperature (15, 18, 21, 24, 27, 30, and 33 ℃) on the embryonic development and larval growth of Sepia lycidas, aimed to search for the optimum temperature for the development and growth of S. lycidas. The results showed that temperature had significant effects on the embryonic development and larval growth of S. lycidas (P<0.05). The suitable temperature for hatching ranged from 21 ℃ to 30 ℃, and the optimum temperature was 24 ℃. At the optimum temperature, the hatching rate was (93.3±2.9) %, incubation period was (24.33±0.58) d, hatching period was (6.00±1.00) d, completely absorked rate of yolk sac was (96.4±3.1) %, and newly hatched larvae mass was (0.258±0.007) g. The effective accumulated temperature model was N=284.42/(T-12.57). The suitable temperature for the larval survival and growth ranged from 21 ℃ to 30 ℃, and the optimum temperature was from 24 ℃ to 27 ℃.At the optimum
 temperature, the survival rate ranged from 70.0% to 73.3%, and the specific growth rate was from 2.4% to 3.8%.