Crawfish IDs help ensure clean crustaceans

Spicy crawfish, known as "little lobsters" in Chinese, are much loved across the country.

But doubts have been raised about the safety of the crustaceans: Were they kept in gutters? Did they eat unclean food?

Many fisheries experts defend the sanitary standards of the delicacy, saying crawfish sold in markets are raised in clean water with healthy food supplies. However, cautious diners still fear they might run into an exception, since wild crawfish - which are highly adaptable - are often seen living in gutters and other unclean places.