In the current study, the role of thyroxine (T4) and cortisol (CO) on growth, reproduction, and whole-body hormone levels in male and female zebrafish was assayed. Fifty-seven days post-fertilization, zebrafish [132 females
initial weight: 0.3 ± 0.0 g and 132 males (initial weight: 0.2 ± 0.0 g)] were fed with diets including 10 mg T4 kg feed