en aquaculture aquaculture پژوهشي Orginal research papers Copepods are suitable to be used as a starter feed for prawn or fish larvae in hatchery. Nowadays, farmers are still having problems sustaining growth of <em>Macrobrachium rosenbergii</em> production since the use of commercial diets such as micro-pallet. This study was carried out for 30 days to determine the best enrichment formula for copepods. Five dietary treatments with triplicates each were used in this study to test efficacy of enriched copepod (<em>Oithona</em> sp.) to <em>M. rosenbergii</em> larvae. The enrichments used were<em> Tetraselmis</em> sp., <em>Nannochloropsis</em> sp., mixed algae (<em>Tetraselmis</em> sp. and <em>Nannochloropsis</em> sp.), yeast (<em>Saccharomyces cerevisiae</em>) and micro-pallet (Dindings Shrimp Feed 2203) diet that acts as the control. Copepods were enriched twice per day (10:00 a.m. and 4:00 p.m.) at 500 mg L^-1 concentration for each diet. Postlarvae were fed at 6-7% of body mass per day. The growth, survival and proximate analysis of <em>M. rosenbergii</em> larvae were conducted to compare effectiveness of each consecutive diet. Higher specific growth rate result of <em>M. rosenbergii</em> was observed when fed with copepod enriched with mixed algae 4.96&plusmn;0.02% and the lowest was when fed with copepod enriched with <em>Nannochloropsis</em> sp. 4.58&plusmn;0.03%. The greatest survival rate for <em>M. rosenbergii</em> was seen when fed with copepod enriched with mixed algae 95.16&plusmn;1.04% compared to that fed with copepod enriched with micro-pallet 89.16&plusmn;1.89%. Among used enrichments, mixed algae produced the best result compared with other enrichment, especially in the proximate analysis of the <em>M. rosenbergii</em> larvae. Mean value of protein, lipid, moisture and ash of <em>M. rosenbergii</em> were found to be 70.45&plusmn;1.22%, 8.55&plusmn;1.11%, 15.30&plusmn;0.16%, and 9.05&plusmn;0.59%, respectively. The results indicated that it is highly recommended to use copepod-enriched with mixed algae to feed giant freshwater prawn larvae (PL5 and above). Copepod, Giant freshwater prawn, Enrichment, Proximate analysis, Microalgae 986 1003 http://jifro.ir/browse.php?a_code=A-10-3663-1&slc_lang=en&sid=1 N.W. Rasdi nadiah.rasdi@umt.edu.my 100319475328460041014 100319475328460041014 Yes Faculty of Fisheries and Food Sciences, M. Ikhwannuddin ikhwanuddin@umt.edu.my 100319475328460041015 100319475328460041015 No Institute of Tropical Aquaculture and Fisheries C.A. Syafika annur.kaka@yahoo.com 100319475328460041016 100319475328460041016 No Faculty of Fisheries and Food Sciences, N. Azani muhammadnizalmie@gmail.com 100319475328460041017 100319475328460041017 No Faculty of Fisheries and Food Sciences, A. Ramli alif.fikri2108@gmail.com 100319475328460041018 100319475328460041018 No Facuty of Science and Marine Environment