The government has imposed a ban on netting Hilsha fish across the country from October 12 to November 2.
The announcement of the ban came on Sunday.
Between this time periods catching and selling Hilsa and Jatka (Hilsa fry less than 23 centimetres in length) will remain prohibited.
However, the fishermen will be supplied with Vulnerable Group Feeding (VGF) cards to avail 40 kg rice within this period.
Last year, the ban was for 15 days in the Bangla month of Ashwin during their primary breeding season according to the lunar calendar.
However, this year, the ban will begin four days ahead of the first full moon in Ashwin and continue for the next 17 days.
According to an estimate of the Department of Fisheries, 385,000 tons of Hilsha were produced in the 2014-15 fiscal year.
The production of Hilsha has ncreased by 400,000 tons in the fiscal year of 2015-16.