In this study, C. pyrenoidosa were cultured with seven different concentrations of Na(2)SeO(4) (0-10 mg/L), and the effects of Na(2)SeO(4) on the growth, Se-forms, and nutritional quality of C. pyrenoidosa were explored. The results showed that at the concentration of 0.5 mg/L Na(2)SeO(4), the C. pyrenoidosa were plump and healthy; the contents of biomass, soluble protein, lipids, and TPUFA reached the highest level; the total Se content in C. pyrenoidosa increased with the increasing Na(2)SeO(4) concentrations. However, the proportion of organ...