King crab question??

So my dad just brought home 3lbs of king crab. They're huge like over 2 feet long. My questions are how can i cook these bc they won't fit in any pot. And also, they are already thawed. So is it bad to freeze em?..... bc i cant eat them all by myself. My dad doesnt eat em bc hes allergic. Can i cook em and put em in fridge till tomorrow?