| Summary: | Protected aquatic wildlife is an important part of the aquatic ecosystems. This paper used CiteSpace document visualization software to analyze the literature on protected aquatic wildlife from 2001 to 2020 in the core database of Web of Science (WoS) and the full-text database of China National Knowledge Infrastructure (CNKI). This paper conducted the knowledge map analysis of annual publication volume, cooperative institutions, national cooperation and keyword clustering. The study found that a total of 634 foreign language papers were published in the past 20 years, with an upward trend in the number of publications, and 128 documents in Chinese showed a fluctuation trend; the organization with the largest number of foreign publications was the US Fish & Wildlife Service, with closer cooperation among research institutions, the organization with the largest number of domestic publications was the Qinghai Fishery Environmental Monitoring Station, with scattered cooperation among research institutions; the United States issued 58.20% of the articles, and had the most close communication with other countries, China issued only 3.31% of the articles, with limited international cooperation; foreign research hotspots were mainly population dynamic distribution, habitat use and genetic diversity and both marine and freshwater species had been studied; domestic research hotspots were mainly regional conservation measures, mainly focusing on the study of freshwater protected aquatic wildlife and there were limitations in the scope of the study. The comprehensive analysis suggested that China should enhance the communication and cooperation between domestic and foreign research institutions, attach importance to the conservation and research of marine endangered aquatic wildlife, strengthen the population dynamics assessment, and carry out domestic research on the habitat use and genetic diversity analysis of protected aquatic wildlife, so as to achieve the recovery of protected aquatic wildlife populations.
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