I have never seen a food writer mention this, but all shrimp imported into the United States must first be washed in chlorine bleach to kill bugs. What this does for the taste, I do not know, but I think we should be told.

The End of the Line: How Overfishing is Changing the World and what We Eat (ed. Univ of California Press, 2008) - ISBN: 9780520255050