This study evaluated the effects of dietary supplementation with four pigment sources on the coloration of
Japanese ornamental carp ( Showa koi) ( Cyprinus carpio L.). Showa koi (which are colored bla ck with scat-tered red patches and white spots) initially weighing 18.04 ± 0.92 g were fed fi ve dietary treatments in
triplicate: a control diet with no added pigments, a diet with 1.5 g kg − 1
Carophyll® red (synthetic, CR
diet)