The present invention relates to the process of preparing enrichment agents or feed additives to enhance nutritive benefit of live preys or artificial fish feed utilizing DHA-producing microalgae, such as thraustochytrids, so as to improve the quality and yield of aquaculture.本發明在於提出一種將生產DHA之微藻(例如破囊壺菌)製成滋養劑及飼料添加劑,用以改善餌料動物及人工飼料配方營養的方法,以藉此提昇水產養殖的成果。