National Fisheries Day, also known as National Fishing Day, is observed in Thailand every September 21. This day commemorates the establishment of the Department of Fisheries in 1921, which plays a crucial role in promoting and regulating the fishing industry. The holiday was originally celebrated on April 13 but was moved to September 21 in 2006 to align with the founding anniversary of the Department. Events on National Fisheries Day include the release of difficult-to-breed fish and aquatic animals, exhibitions, trade fairs, and various contests. The fishing industry in Thailand encompasses aquaculture, wild fisheries, and recreational fishing, with significant species including catfish, Nile tilapia, and giant tiger prawns. However, the industry faces challenges such as over-exploitation of marine resources and illegal fishing practices.