Decisions on feeding often diverge from scientifically reasonable optima, resulting in excessive nutrient input, low feeding efficiency, self-pollution, high production cost and negative environmental impacts. Innovations in feeding technologies and farming practices to improve feed utilisation efficiency are crucially important for sustainability of aquaculture. In this presentation the author tries to present some innovative feeding manipulations at farm level, examine some farming systems and practices that favour higher ecological efficiency, and share some thoughts on innovations at farm level.