This study investigated the Onion Powder (OP) supplementation in the diet of the Gold fish
(Carassius auratus) on the growth survival rate and feed efficiency that were carried out in eight
weeks experimental period. Fish averaging 1.16 ± 0.09 g were randomly stocked into aquarium.
Four experimental diets were prepared to contain onion powder at the concentrations of 0, 0.5, 1
and 1.5% for diets. In order to adapted to experimental condition. The optimal growth performance
and feed efficiency were observed in fish fed the 0.5% onion powder diet. The highest survival rate
in fish fed the 0.5% onion powder diet compared with the control (P<0.05). In conclusion, it can be
suggested that dietary inclusion of 0.5% onion powder could be effective at improving growth and
feed efficiency of Goldfish.