The effects of different temperatures and photoperiods were studied on growth, feed conversion rate and relative expressions of growth hormone receptor Ⅰ (GHR1),growth hormone receptor Ⅱ (GHR2),insulin-like growth factor (IGF)and insulin-like growth factor binding protein (IGFBP) of young Amphiprion ocellaris.The results showed that there was no significant difference among the survival rate of young Amphiprion ocellaris under different temperature and photoperiod conditions(P>0.05). The growth rate and feed conversion rate of fish in 27℃ group were higher than those in other groups. In the photoperiod test, the growth rate and feed conversion rate of fish in 24L:0D group were significantly higher than those in other groups(P<0.05). At the end of the experiments, the expressions of several growth-related genes were investigated. The fish in 27℃ group showed the highest expressions of all the genes investigated(P<0.05). In the photoperiod test, the fish in 24L:0Dgroup showed the highest expressions of all the genes investigated(P<0.05).These results indicated that the most suitable temperature and photoperiod for growth were 27℃ and 24L:0D.