The colour variables a*, hue and chroma had the highest values (P 0.05) after 60 days of experimentation in the FS, control and SP diets respectively. The b* value of the fish fed the SP6 and SP12 diets had significantly higher values (P 0.05) than the other treatments and showed a yellowness value. On the other hand, fish fed FS and control diets showed blueness. The hue values were higher in the FS diet compared with the con- trol and SP diets with averages of 141.79, 108.05 and 85.97 respectively. Similarly, chroma values of the fish were higher in the FS diet compared with the control and SP diets with averages of 10.96, 10.31 and 9.93 respectively.