It appears to me that Mr. Capital is sometimes rendered incapacitated. The plans to turn Sundarbans into a money spinner perhaps met with this fate. In 2004 Amitav Ghosh, whose The Hungry Tide is located in this region, wrote a piece on the issue.
The Ganges-Brahmaputra river system carries eight times as much silt as the Amazon and the waters of this region are thick with suspended particulate matter. This is not an environment that is appropriate for snorkeling or scuba diving. In the water visibility is so low that snorkelers and scuba divers would scarcely be able to see beyond their masks. What is more, these waters are populated by estuarine sharks and marine crocodiles. A substantial number of villagers and fishermen fall prey to these animals every year. Snorkelers and divers would face many dangers.
Even swimming is extremely hazardous in the Sundarbans. The collision of river and sea in this region creates powerful currents, undertows and whirlpools. Drownings are commonplace and boats are often swamped by the swirling water.
Swimmers who accidentally ingest water would face another kind of hazard. Consider for example the experience of an American woman who visited the Sundarbans in the 1970s: she dipped her finger in a river and touched it briefly to her tongue, to test its salinity. Within a short while she developed crippling intestinal convulsions and had to be rushed to hospital. Bacteria and parasites are not least among the many life forms that flourish in the waters of the Sundarbans.
Read more here.