Global demand for animal-sourced foods is accelerating. Fishmeal and crops such as soya are key ingredients in animal feeds but are not ecologically or economically sustainable. Insect protein presents a viable alternative. The PROTEINSECT project is exploring fly larva (maggots), which are nutritious and can be mass produced at low cost, as animal feed. It will develop and optimize maggot production systems, determine safety and quality criteria and evaluate the performance of protein extracts.