Emodin supplementation could relieve the adverse impacts induced by a high plant-protein diet on intestinal health and growth performance of fish, while its application in Pengze crucian carp ( Carassius auratus var. Pengze) is lacking. Pengze crucian carp, an omnivorous fish, belongs to the freshwater Cyprinidae family. In this study, Pengze crucian carp were fed with a normal fishmeal diet (18% fishmeal, FM), a high plant-pr...