Utilizing microbial products could be considered a novel approach to sustain the present growth of the aquafeed sector due to dwindling availability and high cost of fishmeal. Various microbial products in terms of isolates, whole-cell biomass, and live organisms are mainly derived from algae, bacteria, fungi, and yeast through the process of fermentation. They have a balanced amino acid profile and contain several minerals and vitamins. However, essential amino acid index (EAAI) of fungal-based microbial meal was comparatively lower (0.57–0.67) than the other three microbes (0.77–0.90). Microbes were deployed in the production of microbial products ranked as algae > fungus/yeast > bacteria based on their nucleic acid content. The global production of microbial products was valued at US$5.3 billion in 2017 and is predicted to increase by 8.6% in 2018–2023. They could substitute fishmeal by 25–50% in feeds for aquatic species. Notwithstanding, they act as a potential growth promoter, a viable immunostimulant and can control infectious diseases in various aquatic species. The present review reiterates the utilization of microbial products in ameliorating the issues related to the global aquafeed industry, in particular fishmeal demand. However, newer approaches need to be established with regard to fermentation technology and genetic engineering to overcome the present limitations to make them an economical one.

由于越来越少的鱼粉和高成本的鱼粉，使用微生物产品被认为是维持水产饲料行业目前增长的一种新颖方法。在分离物，全细胞生物量和活生物体方面，各种微生物产品主要通过发酵过程衍生自藻类，细菌，真菌和酵母。它们具有平衡的氨基酸特征，并包含多种矿物质和维生素。然而，基于真菌的微生物粉的必需氨基酸指数（EAAI）相对较低（0.57–0.67），低于其他三种微生物（0.77–0.90）。根据其核酸含量，将微生物用于生产藻类>真菌/酵母>细菌的微生物产品中。2017年全球微生物产品生产价值为53亿美元，预计将增长8。2018-2023年为6％。他们可以用25–50％的鱼粉代替水生物种。尽管如此，它们还是潜在的生长促进剂，可行的免疫刺激剂，并且可以控制各种水生物种的传染病。本审查重申了利用微生物产品改善与全球水产饲料行业有关的问题，特别是鱼粉需求。然而，需要在发酵技术和基因工程方面建立更新的方法，以克服目前的局限性，使其成为一种经济的方法。本审查重申了利用微生物产品改善与全球水产饲料行业有关的问题，特别是鱼粉需求。然而，需要在发酵技术和基因工程方面建立更新的方法，以克服目前的局限性，使其成为一种经济的方法。本审查重申了利用微生物产品改善与全球水产饲料行业有关的问题，特别是鱼粉需求。然而，需要在发酵技术和基因工程方面建立更新的方法，以克服目前的局限性，使其成为一种经济的方法。