Gujarat has the country's longest coastline and some world-class fisheries but when you walk into a restaurant in the state and ask for seafood, you're more likely to be served basa from Vietnam instead of red crab from Kutch. Somebody once told me they got freshwater hilsa from Narmada in Bharuch. I retorted, "Really? How many chemicals did you get on your plate?" The gorgeous river is lined with chemical industries that discharge their effluents into it. So if you're eating anything that was caught in the Narmada, make sure it was caught somewhere in Madhya Pradesh. That's probably the reason why farmed basa from Vietnam is the safe choice for restaurants.