They say removing wild-caught fish from aquaculture feed production and diverting them to human consumption, and farming more carp and fewer salmon, could increase global seafood production by 6.1m tonnes, while leaving 3.7m tonnes of fish in the sea.

Lia ní Aodha, of Feedback Global, which worked on the report said: “Salmon farming is a good example of how deeply inefficient and inequitable the global food system is. Much of the nutrient-rich fish used to feed farmed salmon is sourced from regions in the global south, where food insecurity is endemic, while the salmon is mainly sold to consumers in high-income markets in Europe, North America and parts of Asia.”