how to make floating fish pellets,fish feed extrusion process Extrusion, including dry extrusion and wet extrusion, is the aqua fish feed extrusion process where the raw material is pushed forward in the barrel by means of screws and pressed through the die at the end of barrel. The general extrusion process involves a high temperature over a short time. Temperature higher than 100% is needed in order to achieve expansion of the feed as it leaves the die www.pelletizermill.com/floating-fish-feed-pellet-machine.htm