The natural ingredient of clove oil can be used for fish anesthesia because it contains eugenol metabolite compounds. study aims was to determine the effect in induction and recovery time, survival optimum dose process Nilem fish. randomized trial design complete with four treatments tests. Treatment 0.05; 0,10; 0,15; 0.20 mL/L is applied. fastest time at treatment, while 0.05 treatment 100% 0....