HO CHI MINH CITY -- Along Vietnam's tropical coasts, shrimp farmers stand chest-deep in artificial ponds tending to their "troupes" of the shellfish.
Asia's top exporter after India helped crustacean's explosion in popularity

Shrimp's evolution from luxury to buffet staple has come with global environmental and social costs. (Photo by Lien Hoang)
HO CHI MINH CITY -- Along Vietnam's tropical coasts, shrimp farmers stand chest-deep in artificial ponds tending to their "troupes" of the shellfish.