The effects of starvation on growth, morphology and behavior of Pacific cod, Gadus macrocephalus larvae were studied to determine the optimal time point of feeding and the point of no return (PNR). The results showed that the larvae starts to eat on 5-day post hatching (dph) under the water temperature 10.0℃ to 11.0℃, and the volume of yolk sac decreased from 0.2402mm³to 0.0062 mm³ during this period. Compared to the feeding group, the total length, eye diameter, body length, length before anus and body depth of the starvation group showed negative growth after 8dph.Meanwhile, the inflation rate of swim bladder and the volume of swim bladder dropped significantly in the starvation group, which indicated that starvation would lead to delay of larvae development. The initial feeding rate was 30%, and up to 90% on 7dph, holding only one day. It was concluded that the PNR was on 9dph, the optimal feeding time was around 5 to 7dph, and the resistance ability of hunger was poor in the Pacific cod larvae.