Makhana is a type of seed derived from the Euryale ferox plant. They're also sometimes referred to as fox nuts or lotus seeds. Makhanas are widely cultivated throughout Asia and often used in traditional forms of medicine to treat various conditions 

Makhana is considered as an aquatic cash crop in India Bihar in India is the leading state in its production and processing. It is estimated that Bihar accounts for more than 80 percent of total Makhana production in the country. The total area under Makhana cultivation in India is estimated to be 15000 Ha.