Crawfish 
How to peel them...

First of all.  Drink a beer.

Break the head from the tail and pull away the two body parts. At this point some people "suck the heads". 
The are good yeah ! 
You are actually only getting spices from the boil and not eating any body parts.
Gently peel away the
first and second ring of the tail beginning at the top,
freeing the shell from the rest of the shell....unwrapping it around the meat.
Once all but the last few
segments are peeled
away, press down the fan
of the tail between your
thumb and forefinger and
remove the meat.

for a recipe specifically for 20