Sagar Island, widely known as Ganga Sagar is a 213.8 sq km large island which lies at the mouth of the Hooghly River. It has a population of about 2.25 lakh living in about 44 villages.
The Island is part of Indian Sunderban, rich in mangrove swamps, waterways and small rivers. The area is cyclone prone, monsoonal and low-lying, with many settlements located alongside the waterways and coastline. The tides surges into the estuary system, pushing saline water over the embankments and through the breaches of embankments into agricultural fields causing serious damage to the lives and livelihoods of inhabitants. During agricultural lean season, people resort to fishing and collection of prawn seeds, even risking their lives from man-eating tigers and crocodiles.