Jul 6, 2022 · 11/10/2018 · The capability of an extruder enhances the feed manufacturer’s flexibility to produce fish feed pellets for shrimp, crab, eel, catfish, carp, frogs and etc.. 2.High starch gelatinization Feed material goes through the processing of HTST, starch gelatinization degree increase can reach 80-99% for aquatic animals easily digest.