Overview: Culinary specialist Kentetsu Koh journeys to Vietnam's northern city of Hai Phong and discovers one of the area's star culinary attractions: rice paddy crab. Farmers consider the crab to be a pest, but it makes a magnificent soup. Freshwater snails can be caught in the same place. They're simmered with pork and green bananas. There's much more than rice in those paddies.