Global food demand is rising, and serious questions remain about whether supply can increase sustainably (FAO 2018). Land-based expansion is possible but may exacerbate cli-mate change and biodiversity loss, and compromise the delivery of other ecosystem services (Olsen 2011; Foley et al. 2005, 2011; Mbow et al. 2019; Amundson et al. 2015). As food from the sea represents…