The objective of this study was to evaluate the effect of tank color on quality of juvenile golden trevally such as growth, survival rate, respiratory rate and deformation rate reared at elevated temperature. The experiment was arranged with fifteen treatments corresponding to five tank colours (blue, red, yellow, grey, white) reared at three temperature (30, 32, 34?). Each treatment was repeated three times. The quality properties were assessed after four weeks of rearing. The results showed that tank colour and elevated temperature affected the quality of juvenile golden trevally. Following the tank color as red, yellow, blue, grey and white, the growth and survival rate of fish tend to decrease gradually, but the respiratory rate and deformation rate of fish tend to increase. The growth and survival rate of fish gradually decreased and the respiratory rate and the rate of deformation gradually increased as the temperature increased from 30 to 34? at the above tank colours. The combination of tank colour with elevated temperature did not affect the quality of the juvenile. In conclusion, the good quality of juvenile golden trevally can be reared in the condition that the tank colours were red and yellow at the temperature of 30?.
Keywords: Golden trevally, Gnathanodon speciosus, tank colour, elevated temperature.