This study were performed to survey the effect of feeding (Artemia franciscana) enriched with iodine on growth indices and the amount of thyroid hormones (T₃ and T₄) in zebra fish (Danio rerio) larvae. This experiment was conducted in a completely random design in three experimental groups and control with triplicate; group 1(control, unenriched Artemia). Group 2 (fed enriched Artemia with 0.025 gr/l I), group 3 (fed enriched Artemia with 0.05 gr/l I), and group 4 (fed enriched Artemia with 0.1 gr/l I). The larvae were fed four times a day, every four hours. The results showed no significant differences in growth indices among different treatments (P>0.05), but growth was lower in control group. The highest concentration of T3 and T4 was observed in group2, however, the increase amount of T₄ was observed in all experimental group compared to control. The results of this study showed improvements in the growth and thyroid hormones (T3 and T₄) in the enriched Artemia with 0.025 gr/l of Iodin.