In salmon aquaculture, the limited availability of sustainable feed ingredients is a major obstacle. Insects, being part of the natural diet of salmonids, may become a sustainable resource and expand the raw material repertoire. In the AquaFly project, the potential of black soldier fly (Hermetia illucens) grown on low-quality organic matter as a source of sustainable feed ingredients for Atlantic salmon (Salmo salar) was assessed in one freshwater and one seawater feeding trial. In this talk, we presented data from the 16-week seawater feeding trial with salmon (initial body weight, 1.4kg) fed either a reference (REF) or a insect meal (IM) diet. Results on the fish growth, gut health and microbiota were presented and discussed.