The field trial was conducted in 5 earthen ponds (0.02 haeach) located at Jharkhali fish farm complex (N 22◦01.219andE 088◦41.075), a fringe area of Sundarban mangrove eco-region,West Bengal, India. Four different sub lethal salinities, viz., 5, 10, 15and 20 ppt were chosen to assess the effects of salinity on survivaland growth. Simultaneously freshwater (0 ppt salinity) was usedas control.