Forbidden fishing (English: forbidden fishing), pronounced Jinyu prohibits fishing for fish and shrimp; Governments prohibit fishermen from fishing for marine life such as fish at certain times and places in a year. This period is generally the mating and breeding period of fish. Fishing ban in this period can ensure the normal reproduction of fish, which is the embodiment of sustainable development.

Due to the large demand of human beings for marine life, the species and quantity of marine life in the world are rapidly decreasing, resulting in serious damage to marine ecosystems. In order to ensure the stability of ecological balance, governments of various countries prohibit fishermen from fishing for marine life such as fish at specific times and places in a year. This period is generally the mating and breeding period of fish. Fishing is prohibited during this period, which can ensure the normal reproduction of fish and is the embodiment of sustainable development.

In order to protect fishery resources, the fishing ban period is stipulated. Usually, fishing is prohibited for a certain period of time in fishery waters such as fish spawning grounds, feeding grounds, wintering grounds and important migration routes through national or local legislation and international fishery agreements. Similar to the function of no-fishing area. In China, the provisions of closed fishing period and closed fishing area are often used at the same time, that is, fishing is prohibited in designated waters for a certain period of time.