What i do is grab the crab by the flippers sometimes they drop them but u can just use 1 leg 1 flipper then, then i give them a hard crack in the face with a rolic they die instantly but hold them over the side of the boat they lose alot of fluit after u do it. This has worked for me for about 15 years and for my dad for about 45 years we always clean them when we get home they always taste great, good luck
not sure if thats how u spell rolic, its what the ors go in