the growth of L. vannamei. The SGRd of shrimps in the spectra rhythmic fluctuating fromblue to green region increased approximately 15% than that in blue light (Guo et al., 2011). In this study, the SGRd of shrimps in BG treatment was higher than that in B treatment by a factor of about 1.15. Further, the periodic light change may be useful than the rhythmic light change for being more cost-effective in commercial shrimp culture.