Teleost is a widely diverse group of fishes and so do their feeding habits. From aquaculture points of view, there have been un-interrupted efforts to optimize feeding rates with protein as the chief ingredients in the supplementary diet. However, knowledge on its protein absorption is incomplete so far, to acquire absolute feeding design to mobilize enhanced production of animal-source protein as fish biomass. In this review, the variable protein absorption across digestive tract (DT) in this group of fish has been highlighted. Emphasis is given to outline how DT components, like enterocyte specific absorptive mechanisms, are different in anterior and posterior regions of DT or from the absorptive transporter system. The existence of a transporter-based absorption mechanism brings more variability in the protein absorption in teleosts. At least two such transport systems (Na⁺-dependent and Na⁺-independent) with within-system differences impart more variability to protein absorption. Further, shifting from one stage to another stage of development involves considerable modification of the protein absorptive mechanism in teleosts. Gut microbes may also indirectly facilitate protein absorption in teleosts. Overall, the present review projects a comprehensive understanding of the protein absorption in teleosts that will help to strategize the modulation of feeding technology in fish culture.

Teleost是种类繁多的鱼类，它们的摄食习惯也是如此。从水产养殖的角度来看，一直在不间断地努力以蛋白质作为补充饮食中的主要成分来优化饲喂速度。然而，到目前为止，关于其蛋白质吸收的知识尚不完全，因此无法获得绝对的饲喂设计来动员动物源蛋白质作为鱼类生物质的增产。在这篇综述中，这组鱼的整个消化道（DT）的蛋白质吸收变化很明显。重点概述了DT的组成部分，例如肠细胞特异性吸收机制，在DT的前后区域或与吸收转运蛋白系统之间是如何不同的。基于转运蛋白的吸收机制的存在为硬骨鱼的蛋白质吸收带来了更多的可变性。具有系统内差异的^{+ +}和Na ^+-独立）赋予蛋白质吸收更多的可变性。此外，从一个发展阶段转移到另一发展阶段涉及硬骨鱼中蛋白质吸收机制的显着改变。肠道微生物也可能间接促进硬骨鱼的蛋白质吸收。总的来说，本综述对硬骨鱼中蛋白质的吸收有一个全面的了解，这将有助于制定鱼类养殖喂养技术的策略。