PROBLEM TO BE SOLVED: To provide a thermoplastic starch hybrid feed molding at a low price in which marine algae, fish and shellfish or food processing residue is made a main raw material, only edible auxiliary feedstock is used, and which is excellent in shape retention, ingestion, and forming processability, and is easy to store.SOLUTION: An inorganic salt is added to a composition including: 0-60% by weight of marine algae； 0-60% by weight of fish and shellfish including a fish meal or the like, 0-60% by weight of a food processing residue； 10-80% by weight of polysaccharides of starch or the like: and 1-50% by weight of an edible plasticizer, the composition is sterilized under carbon dioxide of a supercritical state or subcritical state of at least 100°C in an extrusion reaction machine, then heat plasticized, and compression formed to have a moderate moisture content as a feed of abalone which has decreased bubbles.
