Cooking Crab!  Fill a large pot 2/3 full of water.  Add about 1/2 c. rock salt per gallon of water.  Bring to a boil.  Add your crab, then bring up to a boil again.  Once it’s at a full boil, keep it boiling for approx. 20 minutes.  To cool the crab when done, just run cool water over them.  Enjoy!!!