The paper dealed with the effect of early period of starvation on the larvae of M. affinis, the relationship between the starvation time and metsmor-phosis time of the larvae, predation and energetics of larvae and postlarvae fee-ding on Artemia nauplii and Brachinous plicatilis and suitable food and food density for different stages of larvae.The significant effect of starvation on the development and metamorphosis of larvae was observed in the laboratory. The relationship between the metamorphosis time of zoeal-I larvae (Dt，hour) and the starvation time (t.hour) could be descri-bled as: Dt=35.88+1.37t(r=0.996). At temperature 28℃ , the PNR-100[point of no return) for zoeal--I larvae seas about 20 hours, PNR-50 about 12 hours, PRS(point of reserve saturation) about 32 hours, PRS--50 about 20-24 hours. Zoeal-II larvae began to ingest the rotifer B. pliicatilis and the ingestion rate was found to increase with progressive increase of larvae development, reached a peak during mysis-III larvae stage,then declined at PLI. Rotifer density being 30 cells/ml, the maximum ingestion rate was obtained. When the rotifer density was 10 cells/ml,the learvae's energy ingestion was 0 .45，0.38, 0.73，0.58，0.55 and 0.63 time as much as the maximum energy ingestion, respectively, during ZII,ZIII,MI,MII,MIII and. PL I larvae stages. Both zoea and mysis larvae couldn't ingest Artemia nauplii. Postlarvaa.-III began to ingest. The daily ingestion and it's relationship with the temperature were also studied.Chaetoceros calcitrans, Dicratarria zhangjiangensis and their combination with Platymonas subcordiformis were all suitable food for Zoeal-I larvae. The metamor-phosis rate would be obviously developed when the laxvae were fed on the combina-tion of C. calcitrans, with B. plicatilis or with Sparulina sp. from zoeal-II to mysis-I stage The combination microalgae such as C.calcitrans.D.zhangjiangensia and P.subcodiformis were also suitable to culture the larvae from zoeal-I to mysis-I stage.Single fed on D. zhangjiangensia or P.subcodiformis, the zoea larvae couldn't deve-lop satisfactorily to mysis stags. But fed on P. subcodiformis at later stage of zoea larvae, the better survival of laeval developing to mysis stage could bs obtained. At the stages of MI to PL I, the best survival and metamorphosis were obtained when the larvae fed on the combinatian of C. calcitrans with B. Plicatilis among the test food organ.isms. The Larvae could also develop well only fed microalgae in combination of C. calitrans with D. zhangjiangensis and P. susbcodaformis. The suitable concentrations of microalgae far culturing Zoeal-I larvae were:C. calcitrans and D. zhangjiangensis 10x10⁴-30x10⁴cells/ml, P.subcodformis 2 x 10⁴-5 x 10⁴cells/ml.