Many fishermen are also using mosquito nets supplied by UNICEF to harvest illegally, fishlings that should be left to grow during the closed season.
Some of those who spoke to Capital FM said they are defying the order because fishing is their main source of income.
"If we stop fishing then we are doomed...beacuse we depend on fishing fo both food and money," said one fisherman holding his green mosquito net. "Yes we know that it is wrong to defy government orders but at the same we look how we going to survive."
The fisheries department announced the closure of open fishing in the waters until early next year.
Director in the department of fisheries Alex Bulirani earlier said they are strengthening their monitoring activities on the lake and other fishing areas to protect fish.
Statistics indicate that about 1.6 million of Malawians depend on fishing as source of both food and income.