A fish-processing unit has been accused of releasing effluents into the Cumbharjua canal at Marcel for the second time since February. Local fishermen on Tuesday complained that various types of dead fish were seen floating in the river and attributed the incident to the effluents discharged by the unit. Following complaints, Tivrem-Orgao Sarpanch Sanket Amonkar visited the Cumbharjua canal, which links to the Mandovi River, to take stock of the situation.