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The purpose of this research was to find the optimum color concentration of water for larval rearing of humbpback grouper ( Cromileptes altivelis ). The experiment conducted using 12 polycarbonat tanks with volume of 200 l. Initial density of larvae was 10 ind/l. Food grade coloring agent was used to result a green color water solution.  Four different water color concentration were tested as treatments i.e.: A 10 ppm; B 20 ppm ; C 30 ppm and D 40 ppm with three replications. The experiment was conducted for 30 days. The result showed that the highest survival rate was exhibited by C treatment (30 ppm) (P<0.05), the B (20 ppm) and D (40 ppm) treatments were significantly different (P<0.05) compare to A (10 ppm.) The survival rates of larvae at the end of experiment were A (8.2%); B (25.6%); C (40.4%) and D (29.3%).

Pemeliharaan Larva Kerapu Bebek (Cromileptes altivelis) dengan Konsentrasi Pewarna Hijau Media Air yang Berbeda