Although the proportion of global catch diverted to non-food uses has begun to contract recently, indicating increasing competition between food and non-food uses of forage fish (FAO,2012a), it is questionable whether sufficient latent demand exists to support reallocation of a substantial portion of the total catch to forage fish to direct human consumption. The use of ‘trash fish’ in fish feeds may be more likely to impact food security, because, in addition to contributing to the indiscriminate removal of juvenile food fish, the sale of trawl by catch may subsidize over exploitation of fish stocks (Funge-Smithetal.,2005). In addition, farm-made feeds are converted to body mass less efficiently than formulated feeds, meaning that the quantity of forage fish required to produce one unit of farmed fish may be several times lower than the quantity of ‘trash fish’