Study on the effect of carotenoids in electric yellow (Labidochromis caeruleus). Fish fed with control diet, astaxanthin, β-carotene, canthaxanthin and zeaxanthin (extracted from corn) at 100 ppm for 6 weeks. Growth performances were not significantly difference (P> 0.05). The L* value there was not significant difference among each treatment. The highest a* value was found in fish fed canthaxanthindiet and significantly difference from others (P