This short course is presented by FoodStream in conjunction with the Centre for Feed Technology (FôrTek), Norway. FoodStream is an Australian company which, working with extrusion specialist Dennis Forte, has been presenting extrusion training in countries including Australia, Thailand, and New Zealand for almost 20 years. This 3-day course covers the principles of extrusion, the design of extrusion processes, and the formulation of extruded aquafeeds. Principles learned will be demonstrated using the extruder in the Centre for Feed Technology pilot plant. The program provides background in general extrusion technology, but is specifically directed at aquafeed extrusion. The course applies to both single and twin screw extrusion technology. The course will cover topics from the basics of extruders and their configuration, through what is happening chemically and physically inside the extruder barrel, to an understanding of extruder dies and extruder instability.