The authorities will strictly monitor banning of fish catching during the months of July and August.
The Forest Department has imposed two-month ban for catching all species of fishes in water bodies in the Sundarbans areas.
Md Mahmudul Hasan, an official of East Sundarbans Department, said: "There are 400 canals in the Sundarban areas ... We have banned fish catching for conserving all sorts of fishes in water bodies of Sundarbans."
"These two months - July and August - are breeding period of all fishes. A section of dishonest fishermen catch fish using poison during these two months," he added.
Catching fish by using poison is a very harmful practice for all indigenous species of fish, Mahmudul said adding, these practices are making huge negative impact on biodiversity.
The Department of Fisheries sources said that the authorities will strictly monitor banning of fish catching during the months of July and August as the fisheries sector is already facing extinction of many indigenous species of fish. The initiative of banning fishing during the two months will significantly contribute to the efforts of checking extinction of fishes in the Sundarbans, they added.