The Hilsa (ilish) is the national fish of the Bangladesh country.It is highly popular mainly because of it's flavor and taste.The Hilsa (Ilish) fish is also popular food amongst the people of South Asia and in the Middle East, but especially with Bengalis and Odias. Bengali fish curry is a popular dish made with mustard oil or seed. The Bengalis popularly call this dish shorshe ilish. It is also popular in India, especially in West Bengal, Odisha, Tripura, Assam, Gujarat and Andhra Pradesh. In Bangladesh, Ilish fish are caught in the Meghna-Jamuna, which flows into the Bay of Bengal and Meghna (lower Brahmaputra), and Jamuna rivers. In India, the Ganges Delta, Rupnarayan (which has the Kolaghater hilsa), Hooghly, Mahanadi,Narmada and Godavari rivers and the Chilika Lake are famous for their fish.