December 4, 2020, Chittagong, Chittagong, Bangladesh: The worker is busy in sorting dry fishes at a dry fish field on Karnaphuli River bank, Chittagong, Bangladesh. .Fish in Bangladesh is preserved through traditional methods as drying, smoking and salting. Drying food is the world's oldest known preservation method, and dried fish has a storage life of several years. (Credit Image: © Sanchayan Chowdhury/Pacific Press via ZUMA Wire)