Bangladesh has become one of the biggest exporters of prawns in the world.
For 30 years, many people in the country's south have made a lot of money farming the crustaceans, also known as shrimp in North America.
But while the industry has benefited some, it has come at a cost to others.
Many non-prawn farmers have been displaced because they can no longer support themselves off their land, which has become contaminated because of the prawn farms.
Al Jazeera's Maher Sattar reports from Khulna, Bangladesh.