There is a proverb in Bangladesh that "Gola bhora Dhan, pukur bhora mach" meaning wicker corn-bin full of paddy and ponds full of fish, but the proverb is going to be untrue as many rivers of the country are vanishing. Hilsa locally known as ilish, the fish has been designated as the national fish of Bangladesh. Body length may reach up to 60 cm, but commonly found 35 to 40 cm. A large-sized hilsa weighs about 2.75 kg. Females are usually larger than males. The hilsa is known to be a fast swimmer and matured in one to two years. Hilsa , one of the most important tropical fish, lives in the sea for most of its life, but migrates at least 1,000 km up in some river system for spawning. The fish is found in the Persian Gulf, Red Sea, Arabian Sea, Bay of Bengal, Vietnam Sea and China Sea. The riverine habitat covers the Satil Arab, and the Tigris and Euphrates of Iran and Iraq, the Indus of Pakistan, the rivers of Eastern and Western India, the Irrawaddy of Myanmar, and the P...
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