Aquaculture is the fastest-growing sector of animal protein production, but ensuring optimal health and performance in aquatic species can be challenging. John Sweetman, international project manager for aquaculture at Alltech, joins the Ag Future podcast to discuss sustainability, innovation and helpful information found in a reference guide he co-authored with fellow aquaculture specialist Gijs Rutjes, "Inside/Out: The Essential Guide to the Skin, Gills and Guts of Fish," which promotes the development of mitigation strategies to achieve optimal productivity.