While all animals needs to eat and all farmed animals need to be fed, aquaculture represents the most efficient method by which to convert feed to edible protein. Research through the NOAA-USDA Alternative Feeds Initiative has accelerated progress toward reducing fishmeal and fish oil use in aquaculture feeds while maintaining the important human health benefits of seafood consumption.The remarkable progress in developing alternatives has reduced reliance on wild fish caught for this purpose. This series of Frequently Asked Questions (FAQs) addresses commonly asked questions related to feeds used in marine aquaculture. We discuss what farmed fish eat and examine issues such as fishmeal and fish oil use in aquaculture and research efforts underway to bring greater sustainability to feed production