The search for sustainable alternatives to fish oil (FO) in aquafeeds is imperative for the long-term sustainability of aquaculture. This study evaluated the effects of partially replacing FO with oils derived from Hermetia illucens (RH) and Musca domestica (RY) larvae at 10%, 30%, and 50% levels on growth, lipid metabolism, hepatic antioxidant capacity, and gut microbiota in juvenile Cyprinus carpio. Results showed distinct s...