The world’s oceans can no longer sustain the ever-rising demand for fish. Aquaculture offers an alternative approach – if production is sustainable and high quality. INRAE, the Aqualande group and its selective breeding company Les Sources de l’Avance, along with the French Poultry and Aquaculture Breeders Technical Centre (SYSAAF) reviewed data from 20 years of a rainbow trout breeding programme conducted by the company.