在海洋生物群落中，从植物、细菌或有机物开始，经植食性动物至各级肉食性动物，依次形成被食者与摄食者的营养关系称为食物链，亦称为"营养链"。食物网是食物链的扩大与复杂化，它表示在各种生物的营养层次多变情况下，形成的错综复杂的网络状营养关系。物质和能量经过海洋食物链和食物网的各个环节所进行的转换与流动，是海洋生态系统中物质循环和能量流动的一个基本过程。本书就带领读者去认识海洋中的食物链。(In the marine communities, starting from plants, bacteria or organic matters, from the phytophagous animals to flesh-eaters at all levels, the trophic relationship between prey and ingester is formed successively, called food chain or "Trophic chain". Food web is the expansion and complexity of the food chain, representing the intricate network trophic relationship formed in the changeable situation of trophic levels of various creatures. The transformation and flow of matters and energy through all links of marine food chain and food web are the basic process of material cycle and energy flow in the marine ecosystem. This book takes the readers to understand the food chain in the ocean.)