Keeping crawfish alive overnight? I'm going to buy Crawfish this Friday night at 9 or 10 and boil them Saturday at noon. Is it possible to keep Crawfish alive overnight? If possible how does one do so?
Oh you're fine. For maximum freshness, follow the advice from (this one is better, no spurious exclamation points!)  this online FAQ

How do I keep crawfish alive until I boil them?
Keep them in the sack and cool with ice, but not submerged in water. A large ice chest works great with the drain spout open and the lid cracked for breathing. Properly wash the crawfish by submerging 2-3 times in clean water. Let them soak for 20-30 minutes the last time. Use of salt on final cleaning is best.