Description : A pile of Hilsha fish unloaded from a trawler, on a push cart, at Fishery ghat in Chittagong, to be supplied in the markets. Bangladesh. Locally known as Ilish, it is the national fish of Bangladesh. Hilsa, always a special delicacy in a Bengali household is prepared in many different ways. It is found in the Bay of Bengal and Padma, Jamuna, Meghna, Karnafully and other coastal rivers of Bangladesh.