The purpose of this study was to investigate the effect of background tank colouration on survival, growth, and development rate of Portunus pelagicus larvae. The results demonstrated that highest survival was achieved in black background colour tanks was statistically significantly different (p__ampersandsignlt;0.05). However, specific growth rate (SGR) was observed higher in red colour tanks over the other treated groups was statistically significantly different (p__ampersandsignlt;0.05). The results also demonstrated that the darker background colour of black and red took 9 days to reach Zoea 4 stage compared to the other treatments background colour tanks, which took 10 days. Meanwhile, the SGR for the treatments of white, orange, and yellow background colour were not determined because none of the Zoea 4 stage from these treatments reached to Megalopa stage. The black background colour is favourable for P. pelagicus larvae rearing to ensure the highest survival, growth and development rate.