Fish farming is the practice of raising and producing fish under controlled conditions in natural and artificial reservoirs. Although fish farming has been practiced in Nepal for decades, it has only been practiced commercially a few years ago. Modern fishing in Nepal is believed to have begun around 2004. However, various excavations show that the practice of catching fish and fish farming in the rivers and lakes here has been prevalent since ancient times. Before 2007, during the reign of the then King Ran Bahadur Shah, 22 streams were built in Balaju and a pond was built in the upper part to start farming local fish such as shahar and katle. In 2003, a fisheries branch was established through the Agricultural Council, and small ponds in Sano Tundikhel located in Balaju and Tripureshwor were set aside for fishing. This center, which is a federal office, is located 5 km from Bhairahawa, the headquarters of Rupandehi district, on the Bhairahawa-Batwal road section of the North Siddhartha Highway. Ward No. 1 of Omsatiya Rural Municipality, Thutipipal, on the east and west sides of the road. It is spread over an area of ​​23 hectares. With the aim of accelerating the fisheries development work, in 2004 BS, 500 live fish fry of Indian Major Carp were imported from Motihari, India and released in a small pond in Tundikhel, Kathmandu, thus starting modern fisheries. In 2013 BS, 600 live fish fry of German Carp breed, covered with scales, were brought from Ooty, India to Kathmandu and reared in a small pond in Balaj. In 2016/017, Israeli common carp were brought from Israel to the Fisheries Development Centers in Godavari and Parwanipur for study and both carp species grew well and reproduced successfully. The Aquatic Animals Conservation Act was formulated in 2017 with the aim of protecting aquatic life. In order to increase production per unit area of ​​the reservoir, grass carp was imported from India in 2023 and silver carp from Japan in 2025.