What is crayfish purging?
Purging of a crayfish refers to making the crayfish empty and clear its intestine. You can do that by keeping the crayfish alive for a few days with no food. That will make the digestive system empty itself, and the otherwise black intestine will be clear before eating the crayfish. Some people think that the cooking water will be less muddy if the intestine is clear. My experience does not verify that idea. Salt is sometimes suggested to purge crayfish. However, in the articles I have read on the subject, the amount of salt has not been mentioned nor the time the crayfish have to be exposed to it. Nor has the procedure been successful in the cases where I have seen it used.
